Originally Posted By: kschachn
I know of one that has gone over 315,000 miles. If you did 3K changes with "more synthetic than conventional" then I'm thinking yours had something else going on besides the typical 1MZ-FE "oil gelling" issue.
Originally Posted By: badtlc
Originally Posted By: ThirdeYe
I know plenty that have gone well over 200,000 miles as long as they're maintained properly. Change the oil as recommended with a quality oil and they shouldn't sludge up. They're just less tolerant of oil change neglect, it seems...
Instead of knowing, maybe you should have owned one. I did. 3k OCIs with pennzoil both conventional and synthetic killed it just above 100k miles. It had more synthetic than conventional. Everything but the engine on that Avalon was well done, though. Great cruising car, roomy and comfy.
Oil gelling wasn't the issue. The passages were too small and become blocked starving the engine of oil. It went from zero consumption to about 1qt per week in literally 7 days. We had the "coupon" for the free cleaning but the dealer couldn't do it soon enough so we just dumped it. It wasn't worth much anyway.
I should add that I have an uncle who has the car that rolled off the assembly line directly in front of it. Carbon copy car, exact same. He uses nothing but Amsoil and regularly runs flushes/cleaners. His is still running with no issues at 200k.