I have owned my 1950 DeSoto Custom club coupe for 20 years. During that time, it has always run on unleaded gasoline without use of lead or octane boosters. Earlier this year I opened the engine to perform a valve job. I saw the hardened exhaust valve seats, and no valve recession. My DeSoto went back on the road within the last three weeks. It has about a tank and half of low-grade Sunoco, and is running the best it ever has. Once I get new tires installed, the DeSoto will be taking even longer, faster trips. The only additive I will take along is Chemtool, which will help with carbon deposits. Dave Duricy 1950 DeSoto Custom club coupe 1968 Imperial Crown covnertible 1973 Imperial LeBaron desotoland.com --- Jhale7572@xxxxxxx wrote: > Hi, > > We have put two tanks of gas through our 1950 > Chrysler Imperial. We used the > additive each time. We talked to a friend and he > said he does not use the > additive with the unleaded. What does everyone > think? We put a tank in tonight > and did not use the additive. > > Any words of wisdom? > > Thank you, Jan and Fred Hale > Central New York > 1950 Chrysler Imperial > __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail