GM Recall: Changes in Oil Viscosity for Enhanced Engine Protection
STOP Following OEM Oil Advice (GM Recall Proves Why) 🔗
00:00 GM Recall Overview
GM has recalled certain Chevy, GMC, and Cadillac vehicles with the L87 6.2L V8 engine due to potential rod bearing failures. This recall affects models from 2021 to 2024 and involves an inspection process and a required change in motor oil viscosity.
01:30 Inspection and Viscosity Change
The inspection looks for misalignment between the crankshaft and camshaft, indicated by a diagnostic trouble code (DTC P00016). If misalignment occurs, the engine is replaced; if not, the oil viscosity is increased from 0W20 to 0W40 to enhance bearing protection.
03:00 Understanding Viscosity
The change to 0W40 improves bearing film thickness, crucial for preventing failures. This adjustment is based on the Stribeck curve, which demonstrates that viscosity, speed, and load impact lubrication stages. The increased viscosity helps compensate for issues like sediment in oil galleries and rough crankshaft surfaces.
05:30 Busting Oil Myths
The video debunks the myth that using a higher viscosity oil than recommended by OEMs can damage the engine. It emphasizes that while GM's recall calls for a thicker oil to enhance engine protection, it's essential to make viscosity changes based on data rather than assumptions.
08:00 Conclusion and Recommendations
While GM's recall is a specific case of increasing oil viscosity for protection, it's crucial to analyze oil samples before and after making any viscosity changes to ensure better engine performance and protection.
What is the main reason for the GM recall?
The GM recall is primarily due to potential rod bearing failures in specific truck and SUV models with the L87 engine.
Why is GM changing the oil viscosity from 0W20 to 0W40?
The viscosity is being increased to improve bearing film thickness, which helps prevent engine failures related to misalignment and rough crankshaft surfaces.
Can using a higher viscosity oil than recommended damage the engine?
Using a higher viscosity oil does not inherently damage the engine, as long as changes are based on data and analysis rather than assumptions.