Car Maintenance Log: What to Record and Why It Pays Off

A maintenance log is a plain record of every service and repair a vehicle gets. It takes a minute per visit to keep, and it pays you back in three ways: you don't miss service that prevents expensive repairs, you can prove the car was looked after when you sell it or make a warranty claim, and you can spot a problem that keeps coming back.

What to record for every service

• Date and odometer reading. Service intervals are almost always “every X miles or Y months, whichever comes first”, so you need both.
• What was done. Be specific: “oil and filter, 0W-20 full synthetic”, not just “service”.
• Parts and fluids used, with brand or part numbers if you have them.
• Who did it: the shop name, or “myself”.
• Cost, split into parts and labor if the invoice shows it.
• The receipt. A photo is enough. For DIY work, keep the parts receipts.
• Notes for next time: “front pads at 4 mm”, “slight seep at the oil pan, watch it”.

Where the service intervals come from

Your owner's manual (or the manufacturer's website) has the maintenance schedule for your exact car, and it's the one to follow. Many manuals have two schedules: normal and “severe” service. Severe usually covers short trips, stop-and-go traffic, towing, dusty roads, extreme heat or cold, and delivery or rideshare driving, which describes a lot of real-world use. If that sounds like your driving, use the severe schedule.

Items most schedules include:

• Engine oil and filter
• Tire rotation, and a tire pressure and tread check
• Engine air filter and cabin air filter
• Brake inspection, and brake fluid replacement
• Coolant
• Transmission fluid (on many cars)
• Spark plugs
• Timing belt, if your engine has one rather than a chain. Missing this one can destroy the engine.

Why the records are worth keeping

Warranty claims

If an engine or transmission fails under warranty, the manufacturer may ask for proof the maintenance was done. Dated receipts with odometer readings are that proof, whether the work was done at a dealer, an independent shop or by you.

Selling the car

A complete service history makes a used car easier to sell and easier to price. Buyers trust a car with records, and it gives you something concrete to point to when you set your price.

Spotting problems early

When you can see that the same part has been replaced twice in a year, or that your fuel economy dropped after a repair, you can go back to the shop with facts instead of a feeling.

Taxes

If you use the car for business and deduct actual expenses, repairs and maintenance are part of the deduction, and you need the receipts. See standard mileage vs actual expenses.

Paper, spreadsheet or app?

A notebook in the glove box works until it gets lost or wet. A spreadsheet works until you're at the shop without your laptop. A phone app keeps the record with you, stores the receipt photo next to the entry, and can remind you when service is due.

Milebook's maintenance log stores each service with the odometer, cost, notes and receipt photos, and sends a push notification when a reminder comes due by date or mileage. It's free for 2 vehicles, and you can export the full history to a spreadsheet any time, for example to hand to a buyer.