The Ford Barn - View Single Post

nelsb01 · 10-25-2024, 03:43 PM

For what its worth...........I poured some Marvel Mystery Oil down the spark plug holes before I fired up my flathead engine the first time. I have not added it to my gas or crankcase.

10-25-2024, 03:43 PM	#2
nelsb01 Senior Member Join Date: May 2010 Location: Up North Posts: 870	Re: Marvel mystery oil.... For what its worth...........I poured some Marvel Mystery Oil down the spark plug holes before I fired up my flathead engine the first time. I have not added it to my gas or crankcase.