Join Date: Jul 2005
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I ran it in my '98 4x4 12V for a few tanks on the way out to SEMA. It's hard to tell, due to different qualities of fuel, but I think it made a significant difference. Engine sure didn't want to smoke any more. I got close to 19 MPG on one tank of fuel, running 80MPH all day. Since running out, the mileage has dropped back to 17-17.5, still running about 80 MPH all day long.
If I can find a hardware store in Houston area, I'll pick up some more and see what happens on the way back to VA.
Only weird thing is it causes Diesel Power cetane boost to become cloudy.