Quote:
Originally Posted by mike561
I was using that STP fuel treatment for a bit. the ash deposits were so thick it was almost bridging the spark plug gap. I've been getting some blow by gases comming through the vented oil cap, but i dont remember it causing ash deposits like this before.
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I use marvel mystery oil with the fuel at 1 oz. per 10 gallons of fuel . this keeps the corrosion down and protects the complete fuel system from damage..this amount is used also in the new vehicles and other engines I own ..this product will over time make your engine run better..more is not better ..sounds like you used way too much stp additive..or you are consuming an excessive amount of engine oil...