Savatreatabvr
Junior Member
I have an 02 RAM 4.7 with 139k miles that has cold start engine clatter. Only last for 60 seconds or so then runs great with plenty of oil pressure and power. My question is, all my life I've heard old timers talk about how good Marvel Mystery Oil is as an additive but after an oil change can I use 5 quarts of Marvel Mystery Oil instead of 5 quarts of motor oil ? Just a crazy thought.