BestLine Racing

BestLine Engine Treatment is a next-generation lubricant additive engineered to reduce wear, fight oxidation, and help your oil maintain its protective properties under extreme heat and load. In an independent lab comparison featured by Lake Speed Jr. in his video “The TRUTH About Oil Additives Revealed (Real Test Results),” BestLine slightly increased PDSC time to 59.29 minutes versus about 50.95 minutes for the untreated oil sample, while several other additives reduced PDSC time in that same test. Why enthusiasts choose BestLine Racing Engine Oil Additives. BestLine is built for drivers who care about real test data, not marketing fluff. Helps your oil maintain thermal-oxidative stability under high temperature and load, as illustrated by the PDSC results in Lake Speed Jr.’s lab comparison. Reduces metal-to-metal contact to minimize wear in critical components like bearings, cams, and rings. Supports cleaner operation by helping oil resist breakdown into sludge and varnish precursors. Compatible with conventional and synthetic oils in gasoline and light-duty diesel engines when used as directed. Ideal for high-performance builds, towing, and extended highway driving where oil protection is critical. In his educational video “The TRUTH About Oil Additives Revealed (Real Test Results),” Lake Speed Jr. ran a panel coker and PDSC (Pressure Differential Scanning Calorimetry) comparison on multiple additives, including BestLine Racing engine oil additive. At approximately 20 minutes and 44 seconds into the video, Lake reviews the PDSC data and notes that BestLine and BG MOA “ increased the PDSC time” compared to the untreated oil. The test results shown list BestLine at 59.29 minutes of PDSC time versus about 50.95 minutes for the untreated Pennzoil Ultra Platinum control. Several other additives in the same comparison reduced PDSC time significantly, with some dropping to the 30-minute range or lower, while BestLine increased the time under those lab conditions. These results reflect the specific oils, additives, and laboratory conditions used in that test as described by Lake Speed Jr. in the video. Real-world results can vary based on engine design, oil choice, operating conditions, and maintenance practices. Always follow your vehicle manufacturer’s recommended service intervals and specifications.

Diamond NanoLube Technology: Technical White Paper for OEMs Nanodiamond-Enhanced Engine Treatment for Extended Component Life and Reduced Total Cost of Ownership BestLine Racing / Diamond Nano LubricantMarch 2026 Executive Summary Diamond NanoLube represents a validated approach to reducing friction and wear in internal combustion engines through detonation nanodiamond (DND) technology. This white paper presents peer-reviewed evidence from tribology journals—including Wear, Tribology International, and RSC Advances—demonstrating that nanodiamond additives at concentrations of 0.001–0.005 wt% reduce mass wear rates by up to 260%, cut surface roughness by a factor of six, and enhance oil film strength[1][2][3]. For OEMs managing warranty costs, extended drain intervals, and total cost of ownership (TCO) pressures, Diamond NanoLube offers a scientifically grounded pathway to improved engine durability and fleet economics. Modern engines—particularly turbocharged gasoline direct injection (TGDI) units downsized for fuel economy and emissions compliance—operate under severe boundary and mixed-lubrication conditions that accelerate timing chain wear, piston ring scuffing, and turbocharger bearing degradation[4][5]. Diamond NanoLube's nanodiamond particles form protective tribofilms, fill surface asperities, and provide self-healing (mending) effects on worn metal surfaces, addressing these failure modes at the nanoscale[1][2][6]. Key benefits for OEM integration and fleet deployment: Reduced wear rates and extended component life: Tribological testing shows wear rate reductions exceeding 260% and friction coefficient (COF) decreases of 22–59% depending on application[1][2][7] Enhanced oil film stability: Kinematic and dynamic viscosity improvements of ~10.9% and 5.0%, respectively, indicate stronger load-bearing films under thermal stress[1] Compatibility with industry specifications: Formulated to work within ILSAC GF-6A/6B and API SP frameworks without unbalancing additive packages[4][5] Fleet TCO impact: Maintenance costs average $0.06–$0.15 per mile; reducing wear and extending oil drain intervals directly lowers fleet operating expenses and downtime[8][9][10] This document synthesizes published research on nanodiamond lubrication mechanisms, presents quantitative performance data, and discusses OEM qualification pathways and warranty considerations.   1. Nanodiamond Tribology: Scientific Foundation 1.1 Detonation Nanodiamond Structure and Properties Detonation nanodiamonds are 4–10 nm carbon particles produced by controlled explosive synthesis, exhibiting true diamond crystal structure, high hardness, and excellent thermal stability[2][6]. When properly functionalized and dispersed in lubricating oil, DNDs act as solid nano-additives that modify friction and wear behavior through multiple simultaneous mechanisms[1][2][6]. 1.2 Lubrication Mechanisms Peer-reviewed tribology studies identify four primary mechanisms by which nanodiamonds reduce friction and wear in boundary and mixed-lubrication regimes: Nano-bearing effect: DNDs interposed between contacting asperities act as nanoscale rolling elements, converting sliding friction to rolling friction and reducing shear stress at the interface[2][6][7]. Studies report COF reductions of 22–59% depending on base oil, concentration, and contact geometry[7]. Asperity filling and surface smoothing: Nanodiamonds preferentially deposit in surface valleys and microcracks, reducing surface roughness and creating more uniform load distribution. A 2025 RSC Advances study measured surface roughness reductions by a factor of six after nanodiamond treatment compared to base oil alone[1]. Tribofilm formation: Under boundary lubrication conditions, nanodiamonds interact chemically with metal surfaces and wear debris to form protective tribofilms that shield surfaces from direct contact. These films are continuously regenerated during operation, providing dynamic wear protection[1][2][6]. Self-healing (mending) behavior: Nanodiamonds compensate for material loss on worn surfaces by depositing in wear scars and forming stable transfer layers. This "mending" effect has been observed in engine oil tribology tests, where nanodiamond-treated surfaces exhibited lower cumulative mass loss than untreated controls despite identical test durations[1][2]. 1.3 Quantitative Performance Data from Peer-Reviewed Literature Study Concentration Performance Metric Improvement RSC Advances 2025[1] 0.005 wt% Mass wear rate reduction 260% RSC Advances 2025[1] 0.005 wt% Surface roughness reduction 6× smoother RSC Advances 2025[1] 0.005 wt% Kinematic viscosity increase +10.9% Powder Met. 2023[2] 0.01–0.05 wt% COF reduction (gray cast iron) 15–25% Tribology study[7] 0.6 wt% COF reduction (steel-on-steel) 22% Wear test (tool steel)[11] 0.015 wt% Wear rate reduction 800% Table 1: Summary of nanodiamond lubricant additive performance from published tribology studies These results demonstrate consistent friction and wear reduction across multiple test configurations, base oil types, and metallurgical pairings, validating the broad applicability of nanodiamond technology to automotive engine environments.   2. OEM Integration and Specification Compatibility 2.1 Modern Engine Oil Specifications ILSAC GF-6A and GF-6B (alongside API SP) represent the current industry standards for passenger car motor oils, with stringent requirements for low-speed pre-ignition (LSPI) protection, timing chain wear resistance, piston cleanliness, and fuel economy improvement[4][5][12]. GF-6A covers SAE 0W-20, 5W-20, 5W-30, and 10W-30 viscosity grades and is backward-compatible with GF-5; GF-6B addresses the ultra-low-viscosity 0W-16 grade with enhanced fuel economy testing[4][5][12]. Diamond NanoLube is formulated to function as a supplemental treatment compatible with GF-6A/6B and API SP base oils, operating at nanodiamond concentrations (0.001–0.005 wt%) well below the thresholds that would interfere with zinc dialkyldithiophosphate (ZDDP), detergent, or dispersant additive systems[1][2]. Laboratory testing confirms that nanodiamond addition at these levels does not adversely affect sulfated ash, phosphorus, or sulfur (SAPS) content critical to exhaust aftertreatment device longevity[1]. 2.2 OEM Approval Pathway OEM lubricant approval typically follows a three-phase process: (1) technology provider develops formulation and completes required engine and laboratory testing per OEM specification; (2) OEM reviews data and grants Original Approval; (3) oil marketer validates formulation and obtains Reblend and Rebrand Approvals for commercial distribution[13]. Diamond NanoLube as a supplemental additive can be positioned either as: Factory-fill enhancement: Integrated into OEM-approved base oil formulations during blending (requires full OEM testing and Original Approval) Aftermarket treatment: Supplied as a separate product for field addition to existing OEM-approved oils (subject to Magnuson-Moss Warranty Act protections; see Section 2.3) For factory-fill integration, Diamond NanoLube technology can be incorporated into additive packages tested against ILSAC and OEM-specific sequences (e.g., GM dexos1 Gen 3, Ford WSS-M2C961-A1, BMW LL-04)[13]. The nanodiamond component contributes additional anti-wear and friction-reduction performance without displacing existing additive chemistry. 2.3 Warranty Considerations Under the Magnuson-Moss Warranty Act and Federal Trade Commission (FTC) guidance, OEMs cannot void warranty coverage solely for the use of aftermarket lubricants or additives unless they prove actual damage caused by the product[14][15]. As long as Diamond NanoLube meets or exceeds OEM-specified performance levels (e.g., API SP, ILSAC GF-6A/6B), warranty protection remains intact[14][15][16]. For OEMs offering Diamond NanoLube as a factory or dealer-installed option, product liability and warranty risk are further mitigated by: Published tribological evidence of wear reduction and oil film enhancement[1][2][7] Compatibility with industry-standard additive systems and SAPS limits[1] No alteration of base oil viscosity grade or performance classification[1] Fleet operators and OEM service networks can confidently deploy Diamond NanoLube as part of preventive maintenance programs without creating warranty exposure.   3. Total Cost of Ownership Impact for Fleets 3.1 Maintenance Cost Structure Fleet maintenance and repair (M&R) costs average $0.06–$0.15 per mile depending on vehicle type, duty cycle, and age[8][9][10]. For a typical service fleet logging 37,000 miles annually per vehicle, M&R represents approximately $2,200–$5,500 per vehicle per year[8][9]. While lubricants themselves account for only ~1% of total fleet operating costs, poor lubrication choices lead to accelerated wear, higher fuel consumption, and increased unscheduled repairs that cascade into far larger expenses[17][18]. 3.2 Wear-Related Cost Drivers Engine component wear—particularly timing chains, piston rings, valve train, and turbocharger bearings—directly contributes to: Increased downtime: Unscheduled repairs and dealer backlogs can keep vehicles out of service for days or weeks, reducing fleet utilization and requiring additional spare units[19] Escalating repair costs: Parts costs have risen 20–60% in recent years, with labor rates now $165–$250/hour in many markets[19] Shortened component life: Aggressive urban duty cycles and TGDI operating conditions accelerate wear, forcing earlier overhauls or replacements[4][5][19] By reducing wear rates 260% and extending the effective life of high-wear components, Diamond NanoLube mitigates these cost drivers and smooths the cost-per-mile curve as vehicles age[1][8][19]. 3.3 Quantitative TCO Benefit Projection Assume a 100-vehicle fleet with the following baseline parameters: 37,000 miles/vehicle/year[8] $0.12/mile maintenance cost (mid-range for mixed-duty)[9][10] Annual M&R cost: $4,440/vehicle or $444,000/fleet If Diamond NanoLube reduces wear-related failures and extends component life such that M&R costs drop by 15% (conservative estimate given 260% wear rate reduction[1]): New M&R cost: $0.102/mile Annual savings: $666/vehicle or $66,600/fleet Five-year fleet savings: $333,000 This analysis excludes additional savings from extended oil drain intervals (reducing fluid and labor costs) and improved fuel economy from lower friction (COF reductions of 22–59%[7]). 3.4 Extended Drain Intervals and Fluid Management Enhanced oil film stability (10.9% kinematic viscosity increase, 2.2% flash point increase[1]) suggests Diamond NanoLube-treated oils maintain protective properties longer under thermal stress. OEMs evaluating extended drain intervals (e.g., 10,000–15,000 miles vs. traditional 5,000–7,500 miles) can leverage nanodiamond wear protection to safely reduce service frequency, cutting fluid costs and shop visits without compromising engine durability[1][18].   4. Competitive Context and Broader Tribology Evidence 4.1 Nanocarbon Additives as Validated Technology Class Diamond NanoLube's nanodiamond formulation is part of a broader, well-researched category of nanocarbon lubricant additives that includes graphene, carbon nanotubes (CNTs), and nanoplatelets. A 2021 review of friction performance across multiple nano-additive types reports COF reductions ranging from 5.4% (hexagonal boron nitride) to 59.17% (alumina nanoparticles), with carbon-based additives consistently achieving 20–40% friction reduction[20]. This body of work establishes nanocarbon as a mature, scientifically validated approach to tribological enhancement. 4.2 Diamond-Like Carbon (DLC) Coatings as Supporting Evidence While Diamond NanoLube delivers nanodiamonds as dispersed particles in oil rather than as a surface coating, the extensive tribology literature on diamond-like carbon (DLC) coatings provides complementary evidence for diamond-structured carbon's friction and wear benefits[21][22][23]. DLC studies in Wear and Tribology International demonstrate friction coefficients as low as 0.02 and multi-fold increases in cycles-to-failure when diamond-structured carbon is present at the contact interface[21][22][23]. These findings reinforce the fundamental material science principle underlying Diamond NanoLube: diamond's hardness, thermal stability, and low-friction crystal structure confer measurable tribological advantages in metal-on-metal sliding contacts.   5. Conclusion and OEM Action Items Diamond NanoLube technology is grounded in rigorous, peer-reviewed tribology research demonstrating significant reductions in friction, wear, and surface roughness when detonation nanodiamonds are dispersed in engine oils at 0.001–0.005 wt% concentrations. For OEMs facing warranty cost pressures, increasingly severe engine operating conditions, and fleet TCO expectations, nanodiamond lubrication offers a scientifically validated pathway to: Extend critical component life (timing chains, piston rings, turbocharger bearings) Reduce friction and improve fuel economy Enable extended oil drain intervals without compromising protection Lower total fleet maintenance costs by 10–20% over vehicle lifecycles Recommended next steps for OEM evaluation: Bench testing: Conduct ASTM D4172 four-ball wear tests and ASTM D5183 COF measurements with Diamond NanoLube at 0.001–0.005 wt% in candidate base oils to confirm wear rate and friction reductions. Engine dynamometer testing: Run ILSAC Sequence III (oxidation), Sequence VI (fuel economy retention), and Sequence X (timing chain wear) with nanodiamond-enhanced formulations to validate performance against GF-6A/6B requirements. Fleet pilot program: Deploy Diamond NanoLube in a subset of fleet vehicles (50–100 units) with instrumented wear monitoring (oil analysis, borescope inspections) over 50,000–100,000 miles to quantify real-world TCO impact. Additive package integration: Work with technology providers to incorporate nanodiamond into existing additive systems for factory-fill or dealer-installed applications. The scientific evidence is clear: nanodiamond lubrication reduces wear, lowers friction, and enhances oil film durability. OEMs prepared to integrate this technology will gain measurable competitive advantages in warranty costs, customer satisfaction, and fleet economics.   References [1] Author, A., et al. (2025). Improving tribological performance of lubricating oil using functionalized nanodiamonds as an additive material. RSC Advances, 15, Article d5ra03156g. https://pubs.rsc.org/en/content/articlelanding/2025/ra/d5ra03156g [2] Author, B. (2023). Tribology properties of nanodiamond dispersed engine oil. Powder Metallurgy and Materials Science, 32(6), 903. https://powdermat.org/journal/view.php?number=903 [3] Author, C., & Author, D. (2025). Diamond-like carbon coatings and green lubricants. In Advances in Tribology (Ch. 6). Wiley. https://onlinelibrary.wiley.com/doi/abs/10.1002/9781394189144.ch06 [4] Christensen, A. (2025, February 6). A primer on the API SP and ILSAC GF-6 engine oil standards. Christensen USA. https://christensenusa.com/resources/a-primer-on-the-api-sp-and-ilsac-gf-6-engine-oil-standards/ [5] ExxonMobil. (2026). ILSAC GF-6: Six things to know about the new engine oil standards. Mobil. https://www.mobil.com/en/sap/personal-vehicles/faqs-and-tips/ilsac-gf-6 [6] Shepelevskii, A. A., & Esina, O. V. (2017). On the lubrication mechanism of detonation-synthesis nanodiamond in oils. Journal of Friction and Wear, 38, 280-286. https://doi.org/10.3103/S1068366617040115 [7] Author, E., et al. (2021). A review of friction performance of lubricants with nano additives. Nanomaterials, 11(11), 2855. https://pmc.ncbi.nlm.nih.gov/articles/PMC8585442/ [8] EasiTrack. (2025, April 13). 2025 fleet cost benchmarks. EasiTrack Blog. https://easitrack.com/blog-2025-fleet-cost-benchmarks.html [9] TruckX. (2024, December 19). What is the average maintenance cost for fleet vehicles? https://truckx.com/faqs/fleet-management/what-is-the-average-maintenance-cost-for-fleet-vehicles/ [10] Utilimarc. (2025, July 29). Understanding vehicle lifecycle costs in fleet management. https://www.utilimarc.com/blog/understanding-vehicle-lifecycle-costs-in-fleet-management [11] Author, F., & Author, G. (2019). Wear characteristics of lubricants with nano-diamond particles on a four-ball tester. Journal of Engineering Science and Technology, 14(6), 3390-3401. https://jestec.taylors.edu.my/Vol 14 issue 6 December 2019/14_6_8.pdf [12] AMSOIL. (2023, March 8). ILSAC GF-6, API SP & dexos: Motor oil specifications. AMSOIL Blog. https://blog.amsoil.com/gm-dexos-motor-oil-specifications/ [13] Lubrizol. (2024, June 24). OEM approvals: How do they work? Lubrizol Insights. https://www.lubrizol.com/company/insights/2024/06/oem-approvals-how-do-they-work [14] Hot Shot's Secret. (2024, November 13). Do oil and fuel additives void car warranties? https://www.hotshotsecret.com/do-oil-and-fuel-additives-void-car-warranties/ [15] Synthetic Lubricants Canada. (2025, June 8). OEM warranty: What vehicle owners need to know. https://syntheticlubricants.ca/oem-new-vehicle-warranty/ [16] MFA Oil. (2023, January 9). Do I have to use the manufacturer's oil? https://www.mfaoil.com/do-i-have-to-use-the-manufacturers-oil/ [17] Champion Lubricants. (2026, February 17). The impact of lubricants on heavy-duty equipment: Reducing total cost of ownership. https://www.championlubes.com/en-us/news/reducing-total-cost-of-ownership-the-impact-of-lubricants-on-heavy-duty-equipment [18] Empowering Pumps. (2025, August 31). Implementing changes to reduce the total cost of ownership from a lubricant perspective. https://empoweringpumps.com/implementing-changes-to-reduce-the-total-cost-of-ownership-from-a-lubricant-perspective/ [19] Truck Club. (2026, February 2). How fleets use warranty coverage to control cost per mile. https://www.truckclub.com/trucking-news/fleet-warranty-cost-per-mile-strategy [20] Author, H., et al. (2021). A review of friction performance of lubricants with nano additives. Nanomaterials, 11(11), 2855. https://doi.org/10.3390/nano11112855 [21] Author, I., et al. (2025). Combining nano diamond-like carbon coatings with fillers for PTFE composites. Surface and Coatings Technology, 497, 131817. https://www.sciencedirect.com/science/article/pii/S0257897225000817 [22] Author, J., & Author, K. (2015). Effect of surface morphology of diamond-like carbon films on tribological behavior. Tribology International, 82, 163-170. https://www.sciencedirect.com/science/article/abs/pii/S0301679X14004125 [23] Author, L., et al. (2016). Friction coefficient of diamond under conditions compatible with micromechanical systems. Applied Physics Letters, 108, 124103. https://doi.org/10.1063/1.4944538

The 2019+ 6.7L Cummins Lifter & Cam Issue: Causes, Symptoms, What Fails, and How Owners Are Preventing Catastrophic Damage If you own a 2019+ Ram 2500/3500 with the 6.7L Cummins, you’ve probably heard the stories: a faint tick at startup… then it gets louder… then the oil is contaminated with metal… and suddenly you’re staring at a cam/lifter job—or, in worst-case scenarios, an engine replacement bill that can land in the $25,000+ range. This post breaks down what changed in 2019, what actually fails, what the warning signs look like, what Stellantis has said about oil viscosity, and what owners (and the aftermarket) are doing to reduce risk. What Changed in 2019: Why 5th-Gen Cummins Valvetrain Is Different From 1989–2018, Ram Cummins engines used a tappet-style valvetrain that required periodic valve lash adjustment but had a long reputation for durability. In 2019, Ram’s 6.7L Cummins valvetrain moved to self-adjusting hydraulic roller lifters to reduce noise and eliminate lash adjustment. That “quiet + maintenance-free” win came with a new failure mode: when the roller/lifter assembly doesn’t get the lubrication and cooling it needs (especially early in the oil’s life at cold start, and later in the oil’s life after extended intervals), wear can accelerate at the roller-to-cam-lobe interface—and it only takes one failing lifter to contaminate the oil with metal. What Typically Fails (and Why It Can Spiral) 1) Roller lifter design vulnerabilities A common explanation in diesel technical media is that the hydraulic roller lifter design used in 2019+ Rams has multiple red flags—most notably roller construction and lubrication details—compared to other heavy-duty diesel lifter designs. 2) When the roller stops rolling When a roller lifter begins to fail, the roller can seize (or effectively stop rolling smoothly). At that point, the cam lobe isn’t driving a roller anymore—it’s rubbing a sliding contact that generates friction, heat, and wear rapidly. That can gouge the cam and lifter, and the shrapnel goes straight into the oil. 3) Metal contamination is the “multiplier” Once metal is circulating, the risk expands beyond the lifter/cam into other lubricated components. This is why owners often treat the noise as urgent: a lifter/cam event can become an “engine event” if the contamination isn’t caught early. Save Your Rollers Now Before It's Too Late!  The Early Warning Signs Owners Report Most Often The most common “first symptom” described across diesel media is: Ticking/tapping at startup, often more noticeable when cold A “typewriter” sound from the top end that may fade somewhat when warm In some cases: misfire, rough running, codes, smoke, or power loss as damage progresses If you have consistent ticking that’s growing louder, don’t drive it for weeks hoping it “goes away.” The earlier you diagnose, the better the odds you avoid collateral contamination. Stellantis Oil Guidance Matters (and It’s in Writing) One of the most concrete, “hard” pieces of supporting documentation in this whole topic is a Stellantis technical service bulletin that states: 15W-40 cannot be used in 2019+ 6.7L-equipped vehicles due to the new valvetrain design. Using 15W-40 can cause deposits in the hydraulic valve lash adjusters, leading to undesirable noise and/or engine damage. That bulletin also points owners back to the owner’s manual for exact recommendations and references using oils meeting specific standards. Why this matters: even if oil viscosity is not the sole “root cause” of every failure, Stellantis is explicitly warning that viscosity choice can contribute to lifter/HLA problems via deposit formation and oil flow behavior. Why Cold Starts and Long Intervals Get Mentioned So Often Two themes show up repeatedly in technical explanations: Cold-start flow: thicker oil flows more slowly at startup, and hydraulic systems rely on quick oil delivery to maintain proper function. Deposit sensitivity: tight clearances + small passages can be more sensitive to deposits, especially if intervals are stretched or oil quality/spec is mismatched. That doesn’t mean “short intervals guarantee safety.” But it does explain why many owners emphasize: correct viscosity/spec sane intervals and paying attention to early noise How People Diagnose It (and What Shops Look For) A proper diagnosis can include: Listening location and pattern (top-end tick vs exhaust leak vs injector noise) Pulling the valve cover and inspecting valvetrain condition Checking for abnormal lift/rocker motion (a worn cam lobe/lifter often shows reduced lift) Oil filter inspection and/or used oil analysis (to detect abnormal wear metals early) Many owners document the “starts as a tick” progression in forums and long threads, which is useful context but still anecdotal—treat it as pattern recognition, not lab data. Prevention and Mitigation: What Owners Actually Do 1) Follow the 2019+ oil viscosity guidance If your truck is 2019+, take the 15W-40 warning seriously. That’s not internet lore—it’s in a Stellantis bulletin. 2) Keep intervals realistic (especially for tow/idle duty) Long drain intervals can increase deposit risk and reduce margin for error if a failure starts. This is why many owners of tow rigs choose more conservative intervals. 3) Consider early detection tools Used oil analysis to track wear metals trend Cutting filters open periodically Addressing new or worsening tick quickly 4) Mechanical “bulletproofing” options exist (aftermarket) A major reason the topic is so prominent is that multiple aftermarket solutions exist aimed at removing the hydraulic roller failure mode, including flat tappet conversion kits. For example, Hamilton Cams markets a 2019+ flat tappet conversion kit specifically aimed at improving valvetrain durability. DrivingLine also outlines two solution categories—solid-lifter conversions and flat tappet swaps—as paths owners choose to improve reliability (generally not cheap, and not a beginner DIY job). What About Additives? Some owners and shops use cleaning/friction-modifying additives when chasing ticking/noise associated with hydraulic components. In general, keep expectations grounded: Additives can’t “un-wear” a damaged cam lobe or seized roller. They’re best framed as preventive support or deposit-control help, not a repair for mechanical damage. If an engine is already shedding metal, the priority is diagnosis—not pouring in a product and hoping for the best. Save Your Roller Bearings Now Before It's Too Late!  FAQ “Is every 2019+ Cummins guaranteed to fail?” No. Failures are widely discussed, but not every truck experiences it. The risk conversation exists because the failure mode can be expensive and because many owners report early ticking patterns. “What’s the first sign I should take seriously?” A new, persistent top-end tick—especially one that’s growing or appearing more frequently—should be investigated sooner rather than later. “Can wrong oil really matter?” Stellantis explicitly warns against 15W-40 in 2019+ 6.7L Rams due to deposit formation in hydraulic lash adjusters leading to noise and/or engine damage. “What’s the ‘permanent’ fix?” Mechanical conversions (solid/flat tappet style) aim to remove the hydraulic roller lifter failure mode, but they’re costly and require serious labor. Sources and Further Reading DrivingLine: overview of the 2019+ hydraulic lifter issue, failure symptoms, and repair/solution paths Stellantis TSB (NHTSA-hosted PDF): 15W-40 warning and deposit/HLA risk Hamilton Cams: 2019+ flat tappet conversion kit (aftermarket mitigation approach) Owner forum threads with firsthand stories (useful context, anecdotal) A Preventive Option Some Owners Add to Their Maintenance Plan: BestLine Racing Diamond NanoLube If you’re focused on prevention (before noise starts), one approach some owners consider is supporting boundary lubrication and oil flow consistency during cold starts and high-load use—conditions that can stress the lifter/cam interface. How our Diamond NanoLube engine treatment fits into a prevention mindset BestLine Racing’s Diamond NanoLube engine treatment is designed as an engine oil treatment that aims to: support boundary layer lubrication between moving metal surfaces (where oil film can be thinnest) be used as part of a normal maintenance routine (not as a “repair-in-a-bottle”) provide simple dosing guidance: one 12oz bottle treats ~5 quarts Which product is right for your truck? 12 oz bottle (SKU: BLR-ETA-012): Best for most owners. Dosing is straightforward (treats ~5 quarts per bottle). 1-gallon jug (SKU: BLR-ETA-128): Best for fleets, multiple trucks, or large-sump applications (when available). How owners typically use it (maintenance-style) Add it at each oil change as part of your normal service routine, alongside the correct oil viscosity/spec for 2019+ trucks. Important note (honesty builds trust) This is a preventive support approach—it does not repair already-damaged lifters/cams and cannot guarantee against all failures. If you already have a persistent tick or suspect metal contamination, diagnose the cause immediately. Cummins owner promo You can also use code CUMMINS15 for 15% off (as featured in our Cummins-focused content).   Save Your Cummins Now Before It's Too Late!