All EWR-SFO (and LAX) flights are P.S., and therefore, are not eligible for CPU. You need to either buy into premium cabin, or use an RPU or mileage upgrade (co-pay is not waived on this route - unless on a full-fare ticket).

Essentially, these are the same as the flights that used to go to JFK. All are 752 (either P.S. with 16C, the ones that used to typically do international 24C) or the occasional 773.