Mobil had a hard time selling AP over EP. EP at the time was rated for 15k and AP 20k. The price difference was enough to sway people from buying it so it ended up not selling well. They then made Mobil 1 EP a 20k mile oil.And is it sort of the general opinion. Around here that the current M1 EP is a step down in the quality of the ingredients from the old AP from a few years ago?
The Triple Action is completely different than both of those previous formulations though.