Quote:
Originally Posted by Marty358
If you reset and forget for another 5000 miles, the Toyota dealer may tell you to forget about your engine warranty. Check your owner's manual for oil change intervals. If you exceed, kiss your warranty goodbye even with synthetic oil.
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They would have to prove that any damage incurred is a direct result to user neglect and the viscosity of the engine oil would be tested first. Given standard use and synthetic oil there really is no reason your viscosity wouldn't be WELL within tolerances. I wouldn't have bothered asking this question unless I knew running 10k miles on my oil was safe. There's plenty of opinions but if you doubt mine, have your oil tested at 5k miles and 10k miles on full synthetic (naturally aspirated of course.. I wouldn't exceed 3k miles on a turbo charged vehicle) and you'll see that the numbers are just fine. If you pay for synthetic oil and change every 5k you're just wasting your money.