2025 test6 products
Which Motor Oil Brand Wins?
- 1Motorcraft Diesel Engine 10W-30
- 2Mobil 1 10W-30 (automotive)
- 3Mobil 1 0W-8
- 4Phillips 66 20W-50 Aviation
- 5Motul 10W-30 Motorcycle
- 6Quicksilver 10W-30 Marine
Project Farm's Motor Oil Tests: Every Result Ranked
Project Farm has tested conventional, synthetic and diesel motor oils on wear protection, cold flow and film strength. Here is every motor oil matchup on the index, ranked as the test found it, with links to our write-up and the source video. Additive and oil-substitute experiments live on their own pages.
What the test measured
The tests measure lubricity and wear-scar size under load, cold-temperature flow and pumpability, evaporation and film strength under heat, and independent lab analysis of the used oil. Products below follow their finishing order.
Brands the tests ranked first
How often each brand took the top spot across these tests.
- 1Pennzoil3 wins
- 2Shell Rotella2 wins
- 3Amsoil2 wins
- 4Motorcraft1 win
- 5SuperTech1 win
- 6Mobil 11 win
Every result, ranked
Each block shows how the test finished. Open our write-up for the full measured table, or watch the original video.
2024 test6 products
Which Diesel Motor Oil Brand Wins?
- 1Mobil Delvac
- 2Rotella T6
- 3Royal Purple Duraleck
- 4Schaeffer's
- 5Hot Shot's Blue Diamond
- 6Amsoil Diesel Oil Signature Series
2024 test6 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerMotorcraft
- What the test placed second
- Runner-upMopar
- 1Motorcraft Full Synthetic
- 2Mopar MaxPro Full Synthetic
- 3ACDelco Full Synthetic
- 4Honda Ultimate Full Synthetic
- 5Toyota
- 6Mobil 1 Advanced Fuel Economy
2023 test4 products
Which Motor Oil Viscosity Brand Wins?
- 1Pennzoil Platinum full synthetic 0W-16
- 2Pennzoil Platinum full synthetic 5W-30
- 3Pennzoil Platinum full synthetic 0W-20
- 4Pennzoil Platinum full synthetic 5W-20
2023 test4 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerSuperTech 10,000-mi High Mileage
- What the test placed second
- Runner-upSuperTech 10,000-mi
- 1SuperTech 10,000-mi High Mileage
- 2SuperTech 10,000-mi
- 3SuperTech 20,000-mi
- 4SuperTech 5,000-mi
2022 test4 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerMobil 1 High Mileage
- What the test placed second
- Runner-upMobil 1 (full synthetic)
- 1Mobil 1 High Mileage full synthetic 5W-30
- 2Mobil 1 full synthetic 5W-30
- 3Supertech High Mileage full synthetic 5W-30
- 4Supertech full synthetic 5W-30
2022 test4 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerPennzoil Ultra Platinum
- 1Pennzoil Ultra Platinum
- 2Pennzoil Full Synthetic
- 3Pennzoil Platinum
- 4Pennzoil Synthetic Blend
2021 test2 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerPennzoil Platinum Full Synthetic
- What the test placed second
- Runner-upHonda Marine
- 1Pennzoil Platinum Full Synthetic 10W-30
- 2Honda Marine SAE 10W-30 (Honda Genuine Oil, meets NMMA FC-W)
2021 test2 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerPennzoil
- What the test placed second
- Runner-upMiller's
- 1Pennzoil Ultra Platinum, full synthetic SAE 5W-30
- 2Miller's Nanodrive, low friction technology, 5W-30 fully synthetic
2020 test2 products
Which Motor Oil Brand Wins?
- 1Arco Multi-Grade Graphite Motor Oil (vintage 1970s, API SE/SF/CC)
- 2Quaker State Advanced Durability 10W-40
2020 test2 products
Which Synthetic Motor Oil (5W-30) Brand Wins?
- 1Kirkland Signature Full Synthetic SAE 5W-30
- 2SuperTech Full Synthetic 5W-30
2020 test2 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerShell Rotella Gas Truck
- What the test placed second
- Runner-upMobil 1
- 1Shell Rotella Gas Truck
- 2Mobil 1
2019 test2 products
Which Diesel Motor Oil Brand Wins?
- What the test ranked first
- Test winnerShell Rotella T6
- What the test placed second
- Runner-upChevron Delo 400
- 1Shell Rotella T6 5W-40 synthetic
- 2Chevron Delo 400 full synthetic 5W-40
2019 test2 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerQuaker State 10W-40 (modern)
- What the test placed second
- Runner-upQuaker State vintage (1950s/60s)
- 1Quaker State 10W-40 conventional motor oil (modern)
- 2Quaker State vintage oil, approximately 60 to 70 years old (1950s can)
2019 test2 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerShell Rotella T6 5W-40
- What the test placed second
- Runner-upShell Rotella T4 15W-40
- 1Shell Rotella T6 5W-40 (full synthetic)
- 2Shell Rotella T4 15W-40 (conventional, diesel rated)
2019 test2 products
Which Motor Oil Brand Wins?
- 110 Oil Mix Blend
- 2Amazon Basics High Mileage Full Synthetic 10W30
2019 test2 products
Which Motor Oil Brand Wins?
- 1Mobil 1 Extended Performance
- 2Mobil 1 Jet Oil
2019 test2 products
Which Synthetic Motor Oil (5W-30) Brand Wins?
- What the test ranked first
- Test winnerAmsoil Signature Series 5W-30
- What the test placed second
- Runner-upPennzoil Ultra Platinum
- 1Amsoil Signature Series 5W-30, 100% synthetic
- 2Pennzoil Ultra Platinum, full synthetic 5W-30
2019 test4 products
Which Motor Oil (tournament Semifinal Round) Brand Wins?
- 1Amsoil Signature Series 5W-30 100% synthetic motor oil
- 2Penrite Vantage
- 3Schaeffer's Supreme 9000
- 4Pennzoil Ultra Platinum full synthetic motor oil
2019 test4 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerAMSOIL Signature Series
- What the test placed second
- Runner-upKendall GT-1 Max
- 1AMSOIL Signature Series
- 2Pennzoil Ultra Platinum
- 3Red Line
- 4Kendall GT-1 Max
2019 test4 products
Which Motor Oil Brand Wins?
- 1Penrite Vantage
- 2Schaeffer's Supreme 9000
- 3Quaker State
- 4Amazon Basics
2019 test4 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerKendall
- What the test placed second
- Runner-upCastrol
- 1Kendall GT-1 Max full synthetic
- 2Castrol Edge Extended Performance
- 3Quaker State Ultimate Durability Full Synthetic 5W-30
- 4Valvoline Full Synthetic
2019 test2 products
Which Engine Oil Brand Wins?
- 15W-30 conventional motor oil
- 2banana (mashed, later diluted with water into what the host calls banana W-30)
2019 test4 products
Which Synthetic Motor Oil (playoff Bracket) Brand Wins?
- 1Penrite Vantage
- 2Motul 8100 Eco-Lite
- 3Pennzoil Platinum
- 4Lucas Synthetic 5W-30
2019 test2 products
Which Motor Oil Brand Wins?
- What the test ranked first
- Test winnerSchaeffer's Supreme 9000
- What the test placed second
- Runner-upMobil 1 Annual Protection
- 1Schaeffer's Supreme 9000
- 2Mobil 1 Annual Protection
2019 test2 products
Which Synthetic Motor Oil Brand Wins?
- What the test ranked first
- Test winnerAmazon Basics
- What the test placed second
- Runner-upLiqui Moly
- 1Amazon Basics Full Synthetic 5W-30 (dexos1 Gen 2, API SN+, ILSAC GF-5)
- 2Liqui Moly Top Tech 4200 5W-30
2019 test2 products
Which Motor Oil Brand Wins?
- 1Bacon grease
- 210W-30 conventional oil
2019 test2 products
Which Synthetic Motor Oil Brand Wins?
- What the test ranked first
- Test winnerRed Line
- What the test placed second
- Runner-upSupertech (Walmart Super Tech)
- 1Red Line
- 2Supertech
2019 test2 products
Which Synthetic Motor Oil Brand Wins?
- What the test ranked first
- Test winnerAmsoil
- What the test placed second
- Runner-upRoyal Purple
- 1Amsoil Signature Series
- 2Royal Purple
2019 test3 products
Which Motor Oil Brand Wins?
- 1Mobil 1 Advanced Full Synthetic
- 2Amazon Basics Full Synthetic
- 3Valvoline 10W-30 Conventional
2017 test2 products
Which Motor Oil Brand Wins?
- 1WD-40
- 210W-30 motor oil conventional