Free tool
Oil change interval calculator
The next oil change is due at whichever limit in your owner's manual comes first: months, distance or engine hours. Enter the last service date and readings, the interval and your usual use, and the calculator shows the due date, the odometer and hour meter readings, the days left and a service sticker you can print.
Next oil change
Enter the last service date, at least one interval limit and, for distance or engine hours, your usual use.
Dates worked out from average use are estimates: check the odometer and the hour meter as the date gets close.
Service sticker
Next oil change
Date
____________
or at
____________
Whichever comes first
Normal or severe service?
Many owner's manuals have two schedules. Ford's manuals, for example, call for extra maintenance when a vehicle mostly tows, idles for long periods or drives at low speed as in delivery or taxi work, makes short trips that never warm the engine, or runs on dusty or sandy roads. Occasional use in those conditions does not need it. Use the interval that matches how the vehicle really runs.
If the vehicle has an oil life monitor, it can call for service before or after a fixed interval. Follow the owner's manual on which one to use, and reset the monitor after each change.
Sources, checked November 6, 2026: Federal Trade Commission, Auto Repair Basics, Preventive Maintenance (consumer.ftc.gov); Ford Motor Company owner's manuals, Special Operating Conditions Scheduled Maintenance (fordservicecontent.com). This calculator holds no maker intervals: use the ones in your owner's manual.
Why the interval matters
Oil wears out with distance, with engine hours and with time, even in a vehicle that sits. The FTC advises following the maintenance schedule in the owner's manual for your type of driving, and says that skipping simple routine maintenance like oil changes can lead to poor fuel economy, unreliability or costly breakdowns, and may void the warranty. A due date on a sticker or in a reminder keeps the change from slipping.
Let the vehicle set the reminder
High Point GPS fleet tracking records the distance and engine hours of each vehicle, so maintenance reminders by distance or engine hours come due without anyone writing down a reading. FleetZap plans preventive maintenance by engine hours or kilometres and keeps the work orders and service history for each unit.
Get a quoteTips for oil change intervals
Use the interval for the way the vehicle really runs: many owner's manuals have a shorter schedule for towing, long idling, short trips or dusty roads.
For trucks and equipment that idle a lot, track engine hours as well as distance: the engine keeps running while the odometer barely moves.
Write the date, the odometer and the hour meter reading on the work order every time, so the next interval starts from a real number.
If the vehicle has an oil life monitor, reset it after each oil change, as the owner's manual says.
Oil change interval questions
- How often should I change my oil?
- Follow the interval in your owner's manual. It usually gives a distance and a time, some manuals also give engine hours, and the oil is due at whichever limit comes first. The FTC advises following the maker's schedule for your type of driving, and asking the shop to explain any schedule that calls for more frequent service.
- What counts as severe or special operating conditions?
- Each maker defines its own. Ford's owner's manuals, for example, list towing a trailer, extensive idling or low speed driving as in delivery or taxi work, short trips that never warm the engine, and dusty or sandy roads. If a vehicle runs mostly in those conditions, the manual calls for extra maintenance, which can include more frequent oil changes.
- Do I change the oil by time even if I barely drive?
- Yes, if your owner's manual gives a time limit. The interval is whichever limit comes first, so a vehicle that sits reaches the month limit long before the distance limit. Enter both in the calculator: it shows which limit comes first and the date for each one, so you can see how close the other limits are.
- Why track engine hours for oil changes?
- Idling adds engine running time without adding distance. Some owner's manuals give an hour limit for heavy commercial use: one Ford manual lists an engine oil and filter change every 5,000 miles, six months or 200 engine hours for extensive idling. Enter the hour limit from your own manual and your average hours of use.
- How does the calculator find the due date?
- It adds the month interval to the last service date, and divides the distance and hour intervals by your average daily use to find when each one would be reached. The earliest of those dates is the due date. The odometer and hour meter readings due are the readings at the last service plus the intervals.