When the unit has 10,000 miles accrued (synthetic oil intervals = longer span of mileage accrual) since last oil change, 20,000 miles since last transmission service, 100-150 hours of generator use, or 9000 miles since last tire rotation the computer automatically prompts us to let us know it’s time to service the RV. When prompted, we will change the oil & filter, check the transmission fluid, radiator coolant, brake fluid, batteries and tires for proper wear. We also track such items as Fuel Filter Replacement, Anti Free/Coolant replacement, and windshield wiper blade replacement.