I've gone 6,500 miles since my last oil change & the FSS currently says I have 2,000 miles left before my next needed oil change.....so at a very minimum that will be 8,500 miles between changes. If you extrapolate a little.....it will be 9,100 miles . Makes the $70 for an oil change seem reasonable compared to the old days of changing oil every 3,000 miles......