Toby, you stated in an earlier post that you had good luck with oil burning using Marvel mystery oil. I threw a small bottle in my oil on Saturday. I will be dropping oil in about a week or so. I heard no noise difference, so that's good, nor am I expecting miracles, just maybe a slowdown of oil consumption. Again at $6.00 a quart, every 1,000 miles, no huge deal either way. As to our op, no additive will seal up a leaky head gasket. If you had a break in the head gasket causing oil/coolant mixture, that would be bad. Nothing short of pulling heads, and replacing the gaskets, will fix that. In the 18 cars/trucks I've owned in the past 48 years, only my 85 Mustang 5.0, and this Suv are the only oil burners. Figures it would be the one I'm keeping!
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