I've seen worse! But it didn't run.... 2000 Chevy 6.5 Turbo Diesel, I think the engine had about 20k on it, had to have never been changed, ran low on oil, and possibly on overheating problem. I let my Intrepid (ithe the notorious 2.7 sludge monster engine) go 6k on the last synthetic oil change, and I'm not happy with how the oil looked, so this time it's going to be 4k. Somewhere in the 4-5k range is probably where I'll keep it with synthetic, and 3k on the button for conventional (which I plan to stay synthetic.) The engine has almost 190k on it, I've had it since about 62k, and except for a rod bearing that started "peeling" (replaced just the bearing, no crank damage or anything, after driving 5-8k miles making noise) no problems with the engine!