| Re: Need Help With 74 Devile Oiling Problems Engine overheating and not changing the oil can cause this problem. Make sure you do not have an overheating problem. Check your oil pressure if you can. I would them replace one quart of oil with a quart of MMO (Marvel Mystery Oil). It's not really a mystery; it has a lot of cleaners in it. It does thin the oil a bit. You might want to go to one higher viscosity with the regular oil. If this doesn’t work after a few hundred miles or so, you could change the lifters out. |