I always thought our change oil reminder was based on simple mileage. It isn't. It actually looks at rpm, temperatures, driving habits, etc. and calculates when to change oil based on those parameters. So it may be 5,000 miles for one person and 3,000 for someone else based on conditions. And it will always prompt to change oil at one year regardless of mileage. Just thought I'd pass it along.
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Jonahs
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