I just got the oil changed in my VX for the first time since I bought it, right at the 3K mark. (The guys at the place that does all my auto work flipped out. I took me longer to talk about the V than to do the work, well, almost.) I had checked the oil every time I got gas and never saw any usage. Then the last fill up, only 300 miles before the oil change, I didn't get a chance to check to oil. When they changed it, I was a quart and a half low. The dude said it wasn't even on the stick when he checked. He checked for leaks, none. (He said the car was in GREAT shape, he thought it was new.) The only thing I could find was very sooty tail pipe. He mentioned that Isuzu was known for burning oil when the oil got thin (hot or old). Have any of you heard of that? (Just past the 80K mile mark.)