Originally Posted By: OneEyeJack
My 84 Civic wagon went about 440K before the oil control rings failed and because of visible of smoke it would not pass California smog. The compression was within new car spec's. I rebuilt the whole engine because I found an NOS Honda factory rebuild all shrink wrapped and ready to go. The bearings, crankshaft, camshaft, and rods were all good. The valves were in such good shape I did not replace any of them, just touched them up along with the seats. If not for the failure of the oil control rings I would have never opened the engine, just kept driving it. I purchased it new and have no plans to ever sell it. I don't drive as much now as I did then so the miles are slow to accumulate, now.
I've got 164K on my 03 4Runner 4.7 V8 and I consider it just broken in. It does not burn enough oil on 10K oil changes to bother with. I hope to never have to touch anything major, ever. I'll be dead before this 2UZ-FE engine wears out.
I use good oil and never abuse either vehicle. This high mileage 75K use a special oil stuff is a joke.
If I had another vehicle to use while doing so, I would consider rebuilding this engine myself, however, this is my daily driver and I can't be without a car for more than a weekend at a time, and even then it's not good. I agree about the high mileage oil, just a gimmick if you ask me...I use the regular 5W-30 the whole time...these Toyota 1.8s always seem to start using about 1 qt between changes at somewhere around the 150 to 200K mile mark, but the consumption never seems to get any worse, so it's never a big deal...