I have been using the gas formula for three tankfuls in my Trailblazer and it helped significantly improving the sluggishness and hesitation in a couple tanks' time. So if there is a price difference, I would say the gas treatment is good enough. I should add I have never felt a tangible improvement in additives much before unless the engine was badly fouled.

I am using the diesel treatment in my Bird. It seems to have reduced the white smoke in winter a bit. I am no longer able to launch trench warfare against my neighboring campers under cover of smoke and must devise new tactics.

I am beginning to detect a loss of mileage. Can't say if that is an additive problem yet, and I don't see why it should be if it were. The engine is 29 years old, but it runs fine. Perhaps I have consumed all the "heavies" in the tank and am left with only "lights" to burn. Or perhaps the refineries are selling lighter fuel.

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Bob Clayton
1979 FC 31 - "Time Machine"

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03-25-2008, 08:48 PM
rfclayton
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Join Date: Feb 2006
Location: Belleair Shore
Posts: 349