Engine Oil & Fluids
Motor oils, synthetics, additives, and the fluids that keep an engine alive, tested for real wear protection. Shoppers cross-shopping fully synthetic engine oil, heavy duty motor oil, high quality motor oil and car motor oil land here for the head to head that settles it.
Category leaderboard
Brands that won the most head-to-head tests in this category.
- 1Red Line3 wins
- 2Pennzoil3 wins
- 3AMSOIL2 wins
- 4Shell Rotella2 wins
- 5Amsoil2 wins
- 6Liqui Moly1 win
All engine oil & fluids tests
Which Motor Oil Additives Brand Wins?
Liqui Moly MOS2
See the resultsWhich Engine Oil Contaminant Brand Wins?
Anti-Seize
See the resultsWhich Engine Coolant Additive Brand Wins?
Red Line SuperCool
See the resultsWhich Motor Oil Brand Wins?
6 products tested
See the resultsWhich Diesel Motor Oil Brand Wins?
Rotella T6
See the resultsWhich Motor Oil Brand Wins?
Motorcraft
See the resultsWhich Chainsaw Bar And Chain Oil Brand Wins?
Harvest King
See the resultsWhich Motor Oil Viscosity Brand Wins?
4 products tested
See the resultsWhich Automatic Transmission Fluid (Dexron VI) Brand Wins?
Red Line D6 ATF
See the resultsWhich Motor Oil Brand Wins?
SuperTech 10,000-mi High Mileage
See the resultsWhich Oil Stop Leak Additive Brand Wins?
AT-205
See the resultsWhich Motor Oil Brand Wins?
Mobil 1 High Mileage
See the resultsWhich Motor Oil Brand Wins?
Pennzoil Ultra Platinum
See the resultsWhich Motor Oil Brand Wins?
Pennzoil Platinum Full Synthetic
See the resultsWhich Motor Oil Brand Wins?
Pennzoil
See the resultsWhich Oil Treatment Additive Brand Wins?
New STP
See the resultsWhich Cutting Oil Brand Wins?
Tap Magic EP Extra Cutting Fluid
See the resultsWhich Two-stroke Oil Brand Wins?
AMSOIL Dominator Racing 2-stroke oil
See the resultsWhich Motor Oil Brand Wins?
2 products tested
See the resultsWhich Synthetic Motor Oil (5W-30) Brand Wins?
Kirkland Signature
See the resultsWhich Motor Oil Brand Wins?
Shell Rotella Gas Truck
See the resultsTransmission Additive: The Test Results
1 products tested
See the resultsWhich Diesel Motor Oil Brand Wins?
Shell Rotella T6
See the resultsWhich Motor Oil Brand Wins?
Quaker State 10W-40 (modern)
See the resultsWhich Motor Oil Brand Wins?
Shell Rotella T6 5W-40
See the resultsWhich Motor Oil Brand Wins?
2 products tested
See the resultsWhich Motor Oil Brand Wins?
2 products tested
See the resultsWhich Synthetic Motor Oil (5W-30) Brand Wins?
Amsoil Signature Series 5W-30
See the resultsWhich Motor Oil (tournament Semifinal Round) Brand Wins?
4 products tested
See the resultsWhich Motor Oil Brand Wins?
AMSOIL Signature Series
See the resultsWhich Motor Oil Brand Wins?
Amazon Basics
See the resultsWhich Motor Oil Brand Wins?
Kendall
See the resultsWhich Engine Oil Brand Wins?
2 products tested
See the resultsWhich Synthetic Motor Oil (playoff Bracket) Brand Wins?
4 products tested
See the resultsWhich Motor Oil Brand Wins?
Schaeffer's Supreme 9000
See the resultsWhich Synthetic Motor Oil Brand Wins?
Amazon Basics
See the resultsWhich Motor Oil Brand Wins?
2 products tested
See the resultsWhich Synthetic Motor Oil Brand Wins?
Red Line
See the resultsWhich Synthetic Motor Oil Brand Wins?
Amsoil
See the resultsWhich Motor Oil Brand Wins?
Amazon Basics
See the resultsOil Additive: The Test Results
1 products tested
See the resultsWhich Two-stroke Engine Oil Brand Wins?
3 products tested
See the resultsBar And Chain Oil: The Test Results
1 products tested
See the resultsEngine Oil / Crankcase Treatment: The Test Results
1 products tested
See the resultsOil Additive: The Test Results
1 products tested
See the resultsEngine Oil: The Test Results
1 products tested
See the resultsOil Additive: The Test Results
1 products tested
See the resultsWhich Motor Oil Brand Wins?
2 products tested
See the resultsWhich Engine Oil Additive Brand Wins?
Lucas Synthetic Oil Stabilizer
See the resultsWhich Oil Additive Brand Wins?
2 products tested
See the resultsWhich Oil Additive (anti-friction / Dry-run Engine Protection) Brand Wins?
BestLine
See the resultsWhich Fuel And Oil Additive Brand Wins?
2 products tested
See the resultsWhich Engine Oil Additive Claims Brand Wins?
2 products tested
See the results