Here is what Clarance Lee, reknown engine designer and builder , has to say about Marvel Mystery Oil.

http://www.radiocontrolzone.com/showthread.php?t=244268


Clarance Lee probably knows more about model engines that any of us will ever know.

If you want to know about this man and his contributions to the modelling world you can read it here. It's very interesting reading and I think you will thoroughly enjoy it.

http://www.craftsmanshipmuseum.com/lee.htm

Frank