Originally Posted by jim74074
After another 500 miles the oil life began to move off of 82%. It went to 81% after 1900 miles since last oil change and 80% when exactly 2000 miles had elapsed! Seems like quite a coincidence and would imply a 10,000 mile interval between changes. Will keep you all posted if oil life veers from a straight line.
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My oil life has been linear too. Now at 5000 miles and 50% life. Thinking about this, it makes sense. It is not a coincidence. The algorithm is for 10,000 miles to be 100% life under "normal" conditions. The algorithm uses the operating conditions and makes a calculation. If the result is within the normal range then you get the linear output. If the result is outside the normal range you get an adjusted output. My driving has been nearly all long highway trips, moderate towing, and non-frigid weather. Apparently, that puts my engine on the normal line for oil life.
BTW, I have not had the TSB update and my build was November, 2013.