sunder said,
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It is full of falsities and just plain made up words like "negative catalysts".


The encyclopedia says,


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catalyst


substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis. Substances that increase the rate of reaction are called positive catalysts or, simply, catalysts, while substances that decrease the rate of reaction are called negative catalysts or inhibitors.




Y'all are probably right. I must be imagining the numbers on the gas pump and hitting the wrong numbers on the calculator. I think I will keep checking anyway. I just filled up the CJ, 184 miles town and country driving, no interstate, including several hours offroad in low range, took 11 gals. My mileage, 16.5 MPG. I see real improvement with the CJ. Believe it or don't. I'm happy! <img src="/forums/images/graemlins/cheers.gif" alt="" />