Motor Oil

25 tests since 2018

Most recent test Jul 2026

WinnerLiqui Moly

See the full verdict →

Older tests below are kept for reference. Products change; lead with the newest result.

Earlier tests

Jan 2025 · 5 tested

Jun 2024 · 5 tested

Mar 2024 · 3 tested

Sep 2023 · 4 tested

Nov 2022 · 2 tested

Jun 2022 · 4 tested

Aug 2021 · 3 tested

May 2021 · 3 tested

Mar 2021 · 2 tested

Jun 2020 · 6 tested

Feb 2020 · 2 tested

Dec 2019 · 2 tested

Jul 2019 · 2 tested

Jun 2019 · 2 tested

Jun 2019 · 14 tested

Jun 2019 · 14 tested

Jun 2019 · 14 tested

May 2019 · 14 tested

May 2019 · 14 tested

Apr 2019 · 14 tested

Apr 2019 · 14 tested

Mar 2019 · 14 tested

Mar 2019 · 2 tested

Jan 2018 · 3 tested

Motor Oil

Most recent test Jul 2026

Are Motor Oil Additives A Scam? ProLube, Lucas, Archoil, Liqui Moly MOS2 and Bestline

Earlier tests

Are All Motor Oils the Same? Let’s Find Out!

How Bad Are Cheap "Diesel" Motor Oils? $14 vs $58

How Bad Is OEM Motor Oil? Honda vs Toyota vs ACDelco?

Will Thin Motor Oil Cause Engine Damage? Let's Settle This!

Is “High Mileage” Motor Oil Safe? Let’s find out! Mobil 1 vs Mobil 1 High Mileage; SuperTech vs STHM

Are They All The Same Motor Oil? Let's Settle This! Four Levels of Pennzoil Motor Oil Compared

Motorboat Engine Oil Better Than Regular Motor Oil?

Make "Biodiesel"? Let’s find out! Diesel vs Biodiesel, Used Motor Oil, Vegetable Oil, MPG

Save Gas with "Nanotechnology" Motor Oil? Better MPGs? Let’s find out!

Is Used Motor Oil As Good As Cutting Oil for Drilling Metal?

Mobil 1 vs Shell Rotella Gas Truck? Let's find out!

Will Annual Oil Change Damage Your Car? Let's find out!

Is Jet Oil better than Mobil 1 Synthetic? Let's find out!

Amsoil or Pennzoil, which wins Championship? Let's find out!

Is Amsoil better than Penrite? Let's find out!

Is Amsoil better than Kendall? Let's find out!

Is Amazon Basics Motor Oil better than Penrite? Let's find out!

Is Castrol Motor Oil better than Kendall? Let's find out!

Is Lucas better than Pennzoil? Let's find out!

Is Mobil 1 better than Schaeffer's Full Synthetic 5W-30 Motor Oil? Let's find out!

Is Amazon Basics better than Liqui Moly? Let's find out!

Is SuperTech Synthetic Oil as good as Red Line? Let's find out!

Is Royal Purple better than Amsoil? Let's find out!

Is Amsoil Power Foam better than Seafoam & MMO? Let's find out!