[Healeys] Marvel Mystery Oil

[stevesylvia2 at comcast.net (Steven)]

Hi all,

I've got a 1961 BN7 with 72,000 miles and to my knowledge, it's never 
had an engine rebuild.  I was thinking of adding some Marvel Mystery Oil 
to clean out carbon deposits that I'm sure must exist.   Naturally I'm 
very cautious about what I put in my engine.

Has anyone ever tried this stuff and if so, what were your results?

Thanks in advance,
Steve 61' BN7