Well you make good points but this car is still under factory warranty and I can not TELL the dealer how to check out my questions. I fully understand how gasoline fueled internal combustion engines work. I am a former GM Proving Grounds Engineer and I have been building and racing powerboats for the past 40 + years. Being a 2007 inductee of the West Coast Boat Racers Museum, right along side of/with Stuart Hillborn, (and others) I have a 'small clue' as to what my Northstar engine is (or is not) doing. I just feel I need to educate my local dealer as to "what is correct and what is not" . If the car were not 'under warranty' I would do the work myself, (after purchasing a TECH 2) but it is and I will continue to "walk the line" as far as dealer services go. I'm just posting this here to "BITCH, CONVERSE, and EDUCATE" myself. Many of you here have more 'miles' logged as far as dealer services and their short commings, I just come here to "exchange information" and I thank all of you for your input.