If you read the Big Jim link on UIM cleaning,
"This does not need to have an oil change or spark plug change after doing this, but if you are going to do such services, it is better to do them after so that you don't take a chance in fouling new plugs and you can dump the junk out of the crankcase."


"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles