Re: Oil change light: Based on miles or viscosity?
Feel free to ask anyone down at your local dealership.
Even the janitor will tell you that you are resetting the mileage in order to get the "Service Needed" light to go away.
If your system was based on usable oil life, there would be an indicator showing you the percentage left.
Toyota doesn't bother to print anything that obvious in your owners manual.
So it's a good thing you belong to this site and can get such important, and interesting information in print.
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