🛢️ Oil Change Interval Tracker

How the due point is worked out

Two countdowns run from the same record, and the earlier one sets the status:

next due mileage = mileage at last change + interval miles
next due date    = last change date + interval months
miles remaining  = next due mileage - current mileage
days remaining   = next due date - today
status = Due Now if either remaining value is 0 or less

With the starting values - changed at 45,000 miles, now reading 47,500, a 5,000-mile interval - the next change falls at 50,000 with 2,500 miles left to run. Once either counter goes negative the badge flips to Due Now and shows how far past due you are.

Choosing the interval

The two interval boxes are yours to set, and the numbers they start on are a common default, not a recommendation for your car. The governing figure is the one in your maintenance schedule, and modern engines on full synthetic often run far longer than 5,000 miles. Adjust for how the car is used:

• Severe service. Short trips that never warm the engine, heavy towing, dusty roads and deep cold all shorten the manufacturer's own interval, usually to a stated severe-duty figure.
• Time matters when mileage does not. Oil degrades sitting still, which is why the months box exists. A car doing 3,000 miles a year hits the time limit first.
• Oil-life monitors. A dash percentage computed from real running conditions beats any fixed interval typed here.

Frequently asked questions