Steve: Now I'm intrigued. Is this stuff something that goes into the oil to clean the gunk, sludge and rot out of it, or is this just another radiator/cooling system flush? If the former, I've heard that cleaning the engine TOO well is actually counter productive, in that the motor, over time, develops a certain amount of "filler" which keeps the clearances tight, keeps the oil seals sealing, and in general, allows the engine to run well, even at high mileage. I recall a lengthy article which pointed out that really getting rid of all the gunk in the motor actually opens up the bearing clearances, the ring gap, the gaskets and the seals to the point where the engine really starts to use oil, leak oil, get noisy, and in effect, beat itself to death. What say you? Oh, and by the way, the article also indicated that draining the oil, refilling the crankcase with Kerosene, running the motor for about two minutes, draining the whole thing over night, replacing the filter and adding new oil accomplishes the same thing as expensive motor flush. Heard of that, too?

Brad