quote:
Originally posted by Spartane:
I used Marvel Mystery Oil in my 2000 Mazda Protege. The first time I added it, the engine immediately smoothed out - it was so dramatic that even my 13-year old son noticed it. So I continued using it, but I then had a persistent spark plug fouling issue that may or may not be related.
I'm no longer driving the Protege, but as far as I can tell, about one ounce of Fuel Power seems to provide about the same effect in my Toyota ECHO as about 12 ounces of Marvel oil did in the Protege. And so far no indication of any kind of spark plug fouling issues.
So I think that Fuel Power may provide all of the benefits of Marvel but perhaps none of the risks. And the 3% mileage improvement that Fuel Power offers is about enough to pay for itself. So with Fuel Power, I get a perpetually smooth running engine, basically for free...