how many of you would trust your new car to have the oil changed at the dealer.ive always changed my own oil but im thinkin maybe its a good idea to use the place where i bought it to change the oil until the warranty is up. by the way i know that since its a chevy they will probaly use a delco filter but who makes gm goodwrench oil.im almost tempted to take 5 qts of havoline everytime i get it changed even though they will probaly charge me the same as if they used there oil.