GM Revises Engine Oil Recommendation for 6.2L V-8 Engines
General Motors has announced a revised recommendation for the engine oil to be used in its L87 6.2-liter V-8 engines. This adjustment marks the second alteration in oil guidelines for these powerplants, which are found in various half-ton trucks and full-size SUVs. The change comes in the wake of an ongoing federal inquiry into potential failures of the 6.2-liter engine and a significant recall initiated in April 2025.
Owners of vehicles equipped with the L87 small-block V-8 have faced a challenging year. Initially, a recall prompted by an investigation from the National Highway Traffic Safety Administration (NHTSA) led GM to suggest a switch from the original 0W-20 weight oil to a heavier Mobil 1 Supercar 0W-40. This recall encompassed nearly 600,000 affected models. Now, a new directive to dealerships recommends transitioning to Mobil 1 FS 0W-40.
The underlying reason for this latest shift appears to be straightforward: the practical aspects of sourcing and cost. A representative from General Motors clarified that the decision to adopt Mobil 1 FS 0W-40 was based on its extensive market presence, more competitive price point, and its ability to fulfill the necessary performance standards required for the recall remedy. This ensures that vehicles can still receive appropriate servicing without compromising the efficacy of the previous recall’s solution.
Dealerships have been instructed to utilize their existing stock of Mobil 1 Supercar 0W-40 before making the transition to the more accessible FS-spec oil. This guidance specifically pertains to vehicles that have undergone inspection and were determined not to require a complete engine replacement as part of the recall. The modification in oil type is not expected to significantly alter the performance benefits established by the initial switch to a heavier 0W-40 oil, as both products fall within the same weight category and meet GM’s specifications for engine protection.
This strategic move underscores GM's commitment to ensuring that its customers can maintain their vehicles effectively, especially in light of the previous engine-related concerns. By prioritizing availability and cost, the company aims to streamline the maintenance process for affected vehicle owners while upholding the integrity and performance standards of their L87 engines.