The API is aiming for a 2027 rollout of the new engine oil spec, which is meant to enhance performance standards.
Engineering Explained on MSN

Not all engine oils are created equal

Look behind the scenes at the extensive testing involved for modern engine oils. Modern engine oils continue to decrease in ...
Preparing for EPA 2027? API’s new PC-12 spec (CL-4 and FB-4) introduces ultra-low viscosity 0W-20 oils and stricter emissions ...
Home mechanics have been pouring vegetable oil into engines for years, sometimes in the fuel tank, sometimes straight into ...