When I found out that the odo didn't turn over to 300K shortly after an oil change,I started using the trip meter and simply added the miles to 299,999. I change my oil every 3-4K miles. Since keeping track of the added mileage, I have about 335K miles on my baby. I am guessing my margin of error is +/- 200 miles.
Wait till the dash not lighting up so no speedo or odometer, the error factor really kicks in then It starts out with only occurring after short trips, then ramps up to not working unless it has sat all day since it was last turned off, to requiring an over night rest ..... to the stage the taxi Prius reached, the rear door seal dislodging causing the door open light to remain lit in the instrument cluster ...... that seemed to be a great fix, as long as we drove the car every day T1 Terry
Daughter's 2007 is at 320,000 and still chugging. Last two oil changes were overlooked and had intervals of 14,000 miles followed by 16,000 miles. Both times was with Mobil1 but man do I have to keep on her. When she was living out of state it wasn't a problem. Somehow it's fallen off her radar.
Daughters can be thus. Ours said one time, the tires on her model 3 were "miracle tires", lasting forever. I thought uhoh, better check this, yup: just about solid wear bars.