Both of my vehicles are right near the 200K mark, my 96 Jeep GC has 210K and my 95 Prizm has 190K. The Prizm had a frozen timing belt tensioner this summer that I replaced, I replaced the water pump and belts at the same time, and a couple years ago the flywheel came apart, but no internal engine work has ever been done to it. The Jeep blew a radiator 2 years ago and put a new water pump on it, I also ripped up the front gears by using the wrong sized spare too long once. I replaced the axle with an high-pinion pumkin. But also no internal work on the engine. Years ago my dad passed along an old Oldsmobile Omega 2.8L I got 450K out of it before putting it pasture. The car after that was a Royale that I got 550K or so out of it before selling it to a neighbor, we moved away before he got rid of it. All those miles and cars are all conventional oil and regular changes...