Has anyone tried doing a piston soak with BG EPR? People seem to have good results when following the instructions, and it seems to be good and cleaning stuck rings. Would it be worth doing a piston soak with?
Not a soak, but I added it to the oil on an oil-burning Ecotec 2.4 and ran it for 20 minutes. Oil turned jet black and after changing the oil and filter the consumption was greatly reduced for a while. That was a hail mary fix since the dealer wouldn't admit the rings were the problem, even though we had the letter from GM and we fell in the window of the faulty piston rings.