Service interval: meaning and examples
A service interval is the gap between one service and the next, set by distance, engine hours, time or a mix of these, whichever comes first. The maker states it in the owner's manual or service booklet.
How it works
A service interval says how long a vehicle or machine can go between services. It can be a distance, a number of engine hours, a period of time, or a combination where the first limit reached applies.
Different parts have different intervals. Oil and filters come round often, while coolant, spark plugs and belts are measured in tens of thousands of miles or several years. The maker's service booklet or owner's manual lists them all.
Intervals depend on the model year, engine, country and how the vehicle is used, so a figure from a forum or a friend's car is not a safe stand-in.
Whichever comes first
Toyota's 2023 US Corolla guide gives a service visit every 5,000 miles or 6 months, and an oil and filter change every 10,000 miles or 12 months with the right oil. It lists spark plugs at 120,000 miles or 144 months. See the full list on our Corolla schedule page.
Illustration: a driver who covers 4,000 miles a year hits the 12-month limit long before 10,000 miles, so the oil change is due by date.
How to track it in Loggy
Loggy does not read intervals for you. Look up the interval in the maker's manual, log the service when it is done, then set a reminder for the next date. Reminders go off on a date and can repeat.
- Find your model's interval in the maker's manual, or on our maintenance schedule pages if your model is listed.
- Log each service with its reading and receipt.
- Set a repeating date reminder for the next one. Loggy reminders go off on a date, not at a reading.
Loggy is a free maintenance logbook app for iOS and Android. The free plan has unlimited vehicles, reminders, PDF export and vehicle transfer, and no ads.
Frequently asked questions
What does "whichever comes first" mean?
You service at the first limit you reach, whether that is the distance, the hours or the time.
Can I stretch a service interval?
Check the manual and your warranty terms first. The maker's interval is the one the warranty is based on.
Does Loggy know my model's intervals?
No. You take them from the maker's manual. Our schedule pages summarise the manual for popular models, with the source linked.