Do Thin Oils Destroy Engines? Lessons From GM’s Massive Recall

Summary by Krater

This video examines why GM's L87 V8 engine experienced a massive recall, evaluating whether switching to a thicker motor oil solves the problem and analyzing the relationship between oil viscosity, engine wear, and fuel economy.

From the video

Answers: Are thinner motor oils damaging engines and should you switch to a thicker oil?

• GM L87 V8 engine recall
• Motor oil viscosity and Stribeck curve
• Thicker oil vs engine reliability
• SAE fuel economy standards and fines
• Engine wear and low-viscosity oils

What it concludes

• Switching to a thicker oil is a band-aid solution, whereas replacing the engine is a true fix.
• J.D. Power awards and performance rankings are based on numerical scores and not necessarily on statistical significance.
• If an engine is manufactured correctly, it can reliably use 0W-20 oil without causing failures.
• Using a thicker oil on track days for high-performance cars helps push positioning back into the hydrodynamic region of the Stribeck curve.
• For most modern engines, wear is not a limiting issue, allowing drivers to take advantage of the efficiency benefits of lower viscosity oils.
• Studies from Honda and SAE demonstrate that 0W-20, 0W-8, and other low-viscosity oils can improve fuel economy without causing significant anti-wear or oil consumption problems.