[randyjohn]

i've tried the STP oil additive and didn't really see much of a difference. when i changed the oil in the truck last i used the Quaker State oil with Slick 50 already mixed in. been running really good through the winter. i will say that the fuel additives i've used over the years didn't really seem to make a difference in the short run. i've been putting in STP fuel system treatment with all my oil changes and at least on my wife's Caravan it did seem to run a little smoother over a period of time. i think i'll look for this sea-foam stuff next. i have always wanted to try Royal Purple too.