I just purchased a 1994 Chevy 3500HD with the 2.5 turbocharged diesel with 200,000 miles on it. Have I made a serious mistake? All my friends say the GM diesels are junk. This rig starts and runs great. It was owned by a mechanic and was his wrecker. I am putting a flatbed on it for landscape work. It will be pulling a 16' utility trailer loaded with mowers. He said it uses 1 quart of oil about every 6000 miles.Was I crazy to buy this truck? Now that I have it, what would be the best service interval to prolong its life? All opinions pro or con would be appreciated.