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dluck

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  1. Seems to me it should be using an ICE hour meter instead of miles. Certainly the computer in the cmax hybrid can keep track of that. In fact it could be smart enough to calculate a better estimate. It knows the engine oil temperature. At an estimated 10000 miles at 50 mph that would be about 200 hours of engine runtime, but lets use 12000 minutes instead. Initialize the counter to 12000. For every minute of runtime with normal oil temperature step it down 1 minute. However for cold oil, step it down 2 minutes. By using statistics, after about 6000 minutes it could estimate when the next oil change will be needed.
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