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How Bad Are Cheap Motor Oils (Diesel Engine Oil)? $14 vs $58
Todd's Picks
Best Overall Performance
Amsoil Signature Series offers the best anti-wear protection and durability, making it the top performer in our tests.
Best Flow Speed
Hot Shot’s Blue Diamond excels in flow speed during cold starts, ensuring optimal engine protection in extreme temperatures.
Best Anti-Wear Additives
Schaeffer’s provides a robust anti-wear additive package, ensuring long engine life and performance.
Tools Tested
Showing 6 of 6 products.
Price per Gallon
Lower evaporation loss indicates better resistance to thermal breakdown and oil consumption.
Smaller wear scar sizes indicate better anti-wear properties and longer engine life.
Faster flow times in cold conditions ensure quicker lubrication during engine startup.
Higher additive content provides better protection against engine wear and prolongs engine life.