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I, too, have read endless postings on the pros and cons of Teflon-based oil additives.

Those who reject these additives have some pretty compelling arguments, and cite some of the "slick" practices of the manufacturers of these products.

On the other hand, anecdotal evidence of users does seem to support some of the claims of the additive marketers. For instance, about 5 years ago I owned a Saab 900 Turbo in which I tried a teflon-based additive. I did, in fact, notice a small but definite improvement in my gas mileage of about 1 mpg. This improvment did not, however, last anywhere near the 50,000mi figure that the makers of the additive suggested in their literature (it was closer to 5,000 miles, I think). Doing a little math, the cost of the additive was not recouped by the improved fuel economy.

But what caused me to quit using them was the idea that teflon particles might, and in fact probably would, be trapped in the oil filter, compromising its ability to filter out the bad stuff. Also there was some concern about teflon accumulating, with repeated use, in some of the smaller passages in the engine and diminishing oil flow. In other words, I was scared that while I was enjoying better gas mileage, I might also be hastening the demise of my engine.

I'm sure that with a little internet surfing you can find more than you ever wanted to know about what people think of this stuff.

Also, I'm pretty certain that Irv Gordon (a hush comes over the room) doesn't use any special oil additives in his P1800, and we all know how well he's done.