Maintenance schedule with notifications.
You already track miles and fuel burned, and you have the maintenance record keeping so the ability when doing a maintenance record to say when the next time that particular maintenance will be do in the form of time, miles or fuel burned. with a page that shows maintenance do within the next 30 days, 10,000 miles and 2,000 gallons. and a recommended schedule for less frequent maintenance items.
Is this a good question?