I just paid %84.48 at an Oil Express place (first time I haven't done it myself but needed a "convienient" change bad). Pulled in and requested 10 qts Mobile 1 10-30 and filter. Told them not to "check" anything else...Well, after about all I could take of the four monkeys trying to open the hood from the inside of the car and in front of the windshield...I popped the bonnet and showed them where the oil goes in. Oh yea, they did 167 oil changes the day before. (quantity vs. quality) At least I actually saw bottles of Mobile 1 going in...but I wasn't counting. But that's not the end of the story. After watching same four monkeys trying to close hood...NO IDEA WHATSOEVER (greasy hand marks up and down the leading edge of the hood by the windshield), I had to rescue my Viper yet again. When I got home and looked closely at my receipt, I noticed they only put 9 quarts in. Went out to check the level and sure enough, one quart low (atleast I didn't pay for 10 quarts). Moral of the story...for me atleast...make the trip to the auto hobbie shop on MacDill AFB and do it myself (until my 4-post lift comes in). Even the simplist of things are too difficult for some "shops". GOOD LUCK