Marvel Mystery oil.
Who knows if it works?
Who knows what evil, lurks in the heats of man?
The Shadow knows...... Buwah ha haha hahaha
The dealers of Blue coal invite you to listen.....
oops, got off topic there.
I don't know if it works.
It does make your oil smell like wintergreen though. And isn't that enough?
My 216 is somewhat tired, I use straight 40, as its thicker and less falls out. When the truck is cold you have to let it warm up and wait for the pressure to drop to 15 at idle. As soon as the oil is warm, after ten miles or so, the idle pressure is down to a reasonable level.
