The "divots" in the cylinder wall are just (somewhat) alarming, I honestly can't recall seeing or hearing of an engine failing like that before. Maybe the jets do more than just cool the underside of the piston(?), but 0W16 dealer bulk and 10K OCIs was a bad combo for that engine. Also a little surprised a JDM engine wasn't at least considered, I bet the bill would have been $1500 smaller.The excessive cylinder wear has to be from a lack of lubrication on those cylinders if the two inner cylinders aren't worn the same. He mentions oil jets, and that they can become clogged. Wonder if the oil jets on those two cylinders were clogged ... he never got into it that far. Plus, he doesn't show the rings on the two inner cylinders that didn't have excessive cylinder wear. I'm not so sure that stuck rings could cause a lack of lubrication between the piston skirts and cylinder ... you'd think it would increase lubrication from lack of oil control on the cylinder walls. But since only 2 of the 4 cylinders exhibited the wear, it has to be a lack of lubrication issue going on IMO.
Funny but I keep hearing and reading the opposite. More like your deviation may in fact be the rule.the average new car buyer keeps there car for like 4 or 5 years
Depends on how one defines "lifetime" ...Here's another: Do you believe in Toyota's lifetime transmission fluid? I ask because Aisin does not. On some forums, you are considered an idiot if "you think you know more than the Toyota engineers".
Years ago an acquaitance didn't change factory oil and filter for 30,000+ miles . I know because I was asked to check it . Car was a '88 FORD Festiva ( Mazda 121 , 1.3 Ltr . ) used for food delivery and went on well over 130,000 miles . The oil was changed after that .