Best Line Oil Additive

Michel | 10-01-2026

If you aren’t someone who makes frequent purchases, selecting the best Best Line Oil Additive won’t be an easy chore for you. However, you shouldn’t be concerned because we have provided you with the most comprehensive list possible of the top Best Line Oil Additive. Have a look at the products on our list, and pick the ones that appeal to you the most.

We researched and tested Best Line Oil Additive in the market to get you this list. Our most recommended product is Red Line Best Line Oil Additive. Check out our picks for all of our favorites, and be sure to read our buying guide to get all the information you need to make the best choice!

Editor's Choice
Red Line 81403 Engine Oil Break-In Additive - 16 Ounce
Red Line 81403 Engine Oil Break-In Additive - 16 Ounce
Premium Pick
Red Line Service Chemicals 17010QT Engine Protectant with PTFE, 32 Ounces
Red Line Service Chemicals 17010QT Engine Protectant with PTFE, 32 Ounces
Budget Pick
BestLine Racing Nano-Diamond Engine Oil Additive for all Gas & Diesel Engines - Reduces Wear, Noise,
BestLine Racing Nano-Diamond Engine Oil Additive for all Gas & Diesel Engines - Reduces Wear, Noise,

Top 10 Best Line Oil Additive

We researched and compared the top products in the Best Line Oil Additive category to provide you with these recommendations.

1. Red Line 81403 Engine Oil Break-In Additive - 16 Ounce

Red Line 81403 Engine Oil Break-In Additive - 16 Ounce
9.8

Red Line

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  • PROVIDES ADDITIVES - To conventional motor oils with antiwear additives like zinc and phosphorus (ZDDP) necessary to protect against camshaft and valvetrain damage on break-in
  • MULTI-USE - 16oz bottle treats up to 12 quarts of motor oil--in many cases, one bottle can serve two engines or oil changes, remember to change these oils more frequently than regular motor oils
  • SPECIAL DETERGENTS - for improved lubricity and less detonation, allows piston rings to seat properly with less-slick oil, while antiwear additives protect other engines components to avoid excessive wear
  • IMPROVED PROTECTION - at startup, lower oil temp, cleanliness
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

2. Red Line Service Chemicals 17010QT Engine Protectant with PTFE, 32 Ounces

Red Line Service Chemicals 17010QT Engine Protectant with PTFE, 32 Ounces
9.5

Red Line

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  • UNSURPASSED PROTECTION: Fortified with PTFE for friction reduction and provides high temperature protection
  • FOR USE: Formulated for use in GDI, MPFI, Hybrid and Diesel engines
  • OIL ENHANCEMENT: Improves oil performance which reduces metal to metal wear and improves fuel economy
  • TIMELINE FOR USE: Use 1 quart of Red Line Engine Protectant with PTFE per 4-6 quart oil change
  • LIFETIME WARRANTY: Red Line Service Chemical Limited Lifetime Warranty Program coverage (if used every 10,000 miles)

3. BestLine Racing Nano-Diamond Engine Oil Additive for all Gas & Diesel Engines - Reduces Wear, Noise,

  • Reduces friction by approximately 60% compared to conventional engines, by forming an ultra-low friction film on top of the Diamond Nano-coating. Oil additive for car engine, and oil treatment for car and truck engines.
  • Treats up to 10 Gallons of your regular engine oil. Use for any type of vehicle, gasoline and diesel engines. Use in motorcycles, cars, classic cars, race cars, commercial trucks, and everything in between.
  • More Concentrated High-Pressure Diamond Nano Engine Treatment Formula. Helps to reduce oil changes and engine noise. Returns power and life to high mileage vehicles. Superior Heat Resistance maintains lubrication integrity up to 1,800F (982C), outperforming conventional PTFE-based additives. Universal Compatibility is effective in gasoline, diesel, hybrid, and racing engines across all platforms.
  • Use one gallon for every 9 gallons of oil; it is best if used at every oil change. Dual-Action Formula combines cleaning detergents with protective additives to: Remove existing sludge, Prevent new deposit formation, and neutralizes acidic oil breakdown. Restore your engine easily with BestLine Racing Diamond Nano Lube, a metal surface treatment.
  • Extreme Heat Resistance and Boundary Layer Protection and Surface Polishing & Friction Reduction The nanoparticles (5-10nm size) act like microscopic ball bearings between moving parts. That fills microscopic grooves in cylinder walls and bearing surfaces, polishes metal surfaces to mirror-like smoothness through mechanical action, and reduces friction by up to 60% compared to conventional oils.

4. Red Line 81403 Engine Oil Break-In Additive - 16 Ounce

Red Line 81403 Engine Oil Break-In Additive - 16 Ounce
8.9

Red Line

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  • PROVIDES ADDITIVES - To conventional motor oils with antiwear additives like zinc and phosphorus (ZDDP) necessary to protect against camshaft and valvetrain damage on break-in
  • MULTI-USE - 16oz bottle treats up to 12 quarts of motor oil--in many cases, one bottle can serve two engines or oil changes, remember to change these oils more frequently than regular motor oils
  • SPECIAL DETERGENTS - for improved lubricity and less detonation, allows piston rings to seat properly with less-slick oil, while antiwear additives protect other engines components to avoid excessive wear
  • IMPROVED PROTECTION - at startup, lower oil temp, cleanliness
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

5. Red Line 40603 Two-Stroke Oil Racing Synthetic - 16 Ounce

Red Line 40603 Two-Stroke Oil Racing Synthetic - 16 Ounce
8.7

Red Line

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  • Ultimate in two-cycle performance, extreme cleanliness
  • Popular in racing and daily applications like motorcycles, marine, snowmobile racing, etc.
  • Dyno proven for gains of 3-5% and more power over longer runs
  • High-temp stability prevents deposits on combustion chambers, exhaust ports, upper ring and piston crown
  • Suggested use at 50:1, but useful up to 100:1 depending on operating conditions

6. Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise,

Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise,
8.5

Prolube

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  • POWER UP ENGINE, CUT THE NOISE: Maximize your engines overall performance with Prolube oil additive. It increases horsepower, reduces engine noise, smooths vibrations, and ensures your engine runs quieter and more efficiently under daily driving or heavy-duty conditions.
  • SAVE ON FUEL COST: Reduce fuel consumption and improve efficiency with Prolube oil treatment. Its advanced formula decreases friction between engine components, optimizes performance, prevents overheating, and allows your engine to run smoother while saving on fuel over time.
  • EXTEND ENGINE LIFESPAN: Protect your engine and extend its life with this powerful engine oil treatment. It reduces engine wear by up to 45%, strengthens lubrication, preserves component condition, minimizes friction damage, and keeps your engine performing at its best for years to come.
  • READY FOR ANY ENGINE TYPE: This versatile oil additive for car engine is compatible with gasoline and diesel engines, as well as transmissions. Its easy-to-use formula blends seamlessly with both synthetic and conventional oils, providing reliable protection and enhanced performance without any hassle.
  • VERSATILITY YOU CAN COUNT ON: Designed to suit nearly any engine, oil treatment for cars offers precise mixing ratios: 1 oz per quart for standard engines and 2 oz per quart for heavy-duty or high-mileage engines. Perfect for cars, trucks, SUVs, and industrial machinery for consistent protection and performance.

7. BestLine Racing - Engine Oil Additive for all Gas & Diesel Engines - Reduces Wear, Noise, Vibration

  • Reduces friction and noise by approximately 60% compared to conventional engines, by forming an ultra-low friction film on top of the Diamond Nano-coating. Oil additive for car engine, and oil treatment for car and truck engines.
  • Use for any type of vehicle, gasoline and diesel engines. Use in motorcycles, cars, classic cars, race cars, commercial trucks, and everything in between.
  • More Concentrated High-Pressure Diamond Nano Engine Treatment Formula. Helps to reduce oil changes and engine noise. Returns power and life to high mileage vehicles. Superior Heat Resistance maintains lubrication integrity up to 1,800F (982C), outperforming conventional PTFE-based additives. Universal Compatibility is effective in gasoline, diesel, hybrid, and racing engines across all platforms.
  • Use one bottle for every 5 quarts of oil; it is best if used at every oil change. Dual-Action Formula combines cleaning detergents with protective additives to: Remove existing sludge, Prevent new deposit formation, and neutralizes acidic oil breakdown. Restore your engine easily with BestLine Racing Diamond Nano Lube, a metal surface treatment.
  • Extreme Heat Resistance and Boundary Layer Protection and Surface Polishing & Friction Reduction The nanoparticles (5-10nm size) act like microscopic ball bearings between moving parts. That fills microscopic grooves in cylinder walls and bearing surfaces, polishes metal surfaces to mirror-like smoothness through mechanical action, and reduces friction by up to 60% compared to conventional oils.
  • Forumlated and manufactured in the USA
  • One Bottle Treats 5-Quarts of your regular oil

8. Red Line 81403 Engine Oil Break-In Additive - 16 Ounce

  • PROVIDES ADDITIVES - To conventional motor oils with antiwear additives like zinc and phosphorus (ZDDP) necessary to protect against camshaft and valvetrain damage on break-in
  • MULTI-USE - 16oz bottle treats up to 12 quarts of motor oil--in many cases, one bottle can serve two engines or oil changes, remember to change these oils more frequently than regular motor oils
  • SPECIAL DETERGENTS - for improved lubricity and less detonation, allows piston rings to seat properly with less-slick oil, while antiwear additives protect other engines components to avoid excessive wear
  • IMPROVED PROTECTION - at startup, lower oil temp, cleanliness
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

9. Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart

Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart
7.9

Red Line

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  • FULLY-SYNTHETIC FORMULAS - created from polyol ester base stocks, offer excellent lubrication under extreme conditions
  • ENGINEERED TO PROVIDE - the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear, exceed API GL-5 specifications
  • NOT RECOMMENDED - for most synchro applications due to the product's extreme slipperiness
  • POPULAR GEAR OIL FOR - Many performance racing applications like Sprint, Midget, Dirt Late Model and Quick Change Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear ends, most popular ShockProof product, many racing and specialty applications
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

10. Red Line 60202 Lead Substitute Fuel Additive, 12 Ounce Bottle, Pack of 12

Red Line 60202 Lead Substitute Fuel Additive, 12 Ounce Bottle, Pack of 12
7.7

Red Line

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  • Prevents valve seat damage in engines designed for leaded gasoline
  • Prolongs the useful life of older engines without updated valve seats
  • Also cleans carburetor deposits and injectors, safe for catalytic converters
  • For racing, marine or off-road use only; one bottle treats up to 25 gallons
1

Michel

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