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The oil indicator is based on an algorithm, monitor(a piece of software). The ECU clock has ticks. When the engine has been operated to a number of ticks(time) the oil light is illuminated. The number of ticks is added to by the average oil temperature and the number of combustion events. Combustion events expose a small amount of oil to degradation by ...


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I went ahead and pulled out the manual for the car last night. It said something to the effect of the measurement being usage-based (i.e.: things like odometer/number of engine revolutions/etc, which do not directly reflect the quality of the oil, are used instead of an actual testing of the oil itself). It did not specifically say the odometer was used, ...


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There are two different types of oil life indicators, as discussed on this page. First, there is the Algorithm-based one: Algorithm-based oil indicators measure lots of factors and then plug the resulting numbers into a formula. Based on the answer to this complex, ongoing math problem, the indicator display will tell you whether the oil is OK, is close ...



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