The Miles Car Maintenance Blog.
Practical guides on tracking car maintenance, picking the right service intervals, and getting more money for your car when you sell it.
June 9, 2026 · 9 min read
How to track car maintenance: the complete guide
Why a real maintenance log pays for itself the day you sell, what to actually write down for every service, and how to pick intervals that match how you drive.
June 9, 2026 · 7 min read
When to change your engine oil: real intervals by car
The 3,000-mile rule is mostly marketing. Here’s what manufacturers, mechanics, and oil chemists actually recommend — and how to decide which interval is right for your car.
June 13, 2026 · 6 min read
How often should you rotate your tires?
Roughly every 5,000 to 8,000 miles, and many people just do it at every oil change. The interval range, the pattern for your drivetrain, and the signs you’re overdue.
June 13, 2026 · 7 min read
Brake pads and rotors: when to replace them
How long pads and rotors really last, what squealing versus grinding means, and why catching worn pads early saves your rotors and your money.
June 13, 2026 · 6 min read
When to change your transmission fluid
Real interval ranges for automatic, manual, and CVT transmissions, the honest truth about “lifetime” fluid, and the warning signs to watch for.
June 13, 2026 · 6 min read
Engine and cabin air filter replacement schedule
Your car has two air filters, not one. The intervals for each, the warning signs (weak A/C, musty smell), and how to keep both on schedule.
June 13, 2026 · 6 min read
When to change your brake fluid
A different job from brake pads. Brake fluid is mostly time-based — commonly every 2 to 3 years — because it absorbs moisture, and it is one of the most overlooked services.
June 13, 2026 · 7 min read
When to change engine coolant (antifreeze)
Older coolant around every 30,000 miles, modern long-life types far less often. Why coolant type matters, the warning signs, and the safety cautions.
June 13, 2026 · 6 min read
When to replace your spark plugs
Roughly 30,000 miles for copper, 60,000 for platinum, 100,000 for iridium. Why the material changes the interval and the signs of worn plugs.
June 13, 2026 · 6 min read
How long do car batteries last?
Roughly 3 to 5 years, but heat is the real killer and cold just exposes a weak one. The warning signs, and why you should test before you replace.
June 13, 2026 · 7 min read
Electric car maintenance: what you actually need
No oil changes or spark plugs, but lower-maintenance is not no-maintenance. The short list an EV still needs — tires, brake fluid, cabin filter, the 12V battery.
June 13, 2026 · 7 min read
Maintenance records to keep when selling a used car
The paperwork does a lot of the selling. The full checklist of what to gather — and how to share it without giving away your personal information.
June 9, 2026 · 8 min read
Best car maintenance apps for iPhone in 2026 (honest comparison)
Miles, Drivvo, AUTOsist, Simply Auto, and Carfax Car Care. Pricing, features, privacy, and what to actually pick.