Your thinking is correct. The nominal interval is 10,000 miles (follow FSS) or annually, whichever comes first. You could probably fudge some as well, but personally I would not.
Side note: At that rate of mileage accumulation, you must have the most pristine 163 on the planet.
Good luck.
Side note: At that rate of mileage accumulation, you must have the most pristine 163 on the planet.
Good luck.