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My last oil change I did at 10,520 miles on vehicle. 3135 miles on oil. OLM says 44% remaining. `25 Silverado 5.3. 4 oil changes on this thing at this mileage. -
Our state has a lower violent crime rate than Texas and where I live it's virtually nothing. But, do you, cucumber. Keep that blindfold on regarding your state's own corruption. -
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By Grumpy Bear · Posted
One would think. BUT....This is what a Google search gives for the GM OLM system: It doesn't measure oil condition save the highly indirect water temperature. It should measure oil temperature and as we've discussed they are not as closely related as one might assume. The algorithm is based on expected conditions at the end of a certain number of miles or revolutions. And sirs, this estimated value is not tilted in the engines favor. It favors the OEM's bottom line. There are no magical number of miles nor revolutions. No magical time limit. There is only what can be measured directly and only in the broadest of terms would the values used even come close to reality. It samples nothing. It has no idea where the oil started or where it will finish given the limited values use to create the algorithm. It is just a reminder for the brain dead to do something at some time to keep the warranty in tact. Pure fiction. Key Factors in Oil Life Calculation The OLM calculates the remaining oil life percentage based on the following factors: Factor Description Engine Revolutions Tracks the number of engine revolutions since the last reset, decreasing oil life with use. Mileage Since Last Reset Monitors the distance driven since the last oil change, capped at 7,500 miles for most models. Time Since Reset Decreases oil life over time, dropping to 0% after one year, regardless of mileage. Engine Temperature Adjusts oil life based on coolant temperature; exceeding 260°F sets oil life to 0%.
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