Final answer:
Randy should bring his car in for an oil change at the odometer reading of 66,350 miles.
Step-by-step explanation:
To determine at what odometer reading Randy should bring his car in for an oil change, we need to add the mileage for the next oil change to the current odometer reading. Randy's car has an odometer reading of 63,350 miles, and the next oil change is due in 3,000 miles. Therefore, Randy should bring his car in for an oil change at the odometer reading of 66,350 miles.