PC-11 or Proposed Category 11 is the working title for the new API category of heavy duty engine oils in development to be available December 1, 2016. The next generation of heavy duty engine oils will surpass the performance of the current category of heavy duty engine oils. API-CJ4— offering better fuel economy along with superb engine protection against wear, oxidation and deposit buildup. PC-11 diesel engine oil improvements will benefit both new and older engines, as well as, on and off road vehicles.
Chevron’s PC-11 Explained website helps customers prepare for the engine oil category change.