How Often Should You Change Your Oil?
4 min read · Updated 2026-07-07
Short answer: for most modern vehicles running synthetic oil, every 5,000–7,500 miles or 6–12 months, whichever comes first. The old 3,000-mile rule is outdated for nearly every car built in the last two decades — but the right answer is always the interval in your owner’s manual.
Find your real interval
Your owner’s manual (or the manufacturer’s website) lists the interval by engine and oil type. Many manufacturers now specify 7,500–10,000 miles on full synthetic under normal conditions. If your car has an oil-life monitor, trust it — it tracks actual engine conditions, not just mileage.
When to shorten the interval
The "severe service" schedule in your manual applies more often than people think: mostly short trips under 20 minutes (the engine never fully warms up), towing or heavy loads, extreme heat or cold, dusty roads, or lots of stop-and-go. Severe service typically means changing at roughly the low end of the range — and time matters as much as miles for low-mileage cars, because oil degrades sitting in the pan.
Why it is still the most important service
Oil is the engine’s only defense against metal-on-metal wear. Stretching intervals saves tens of dollars and risks thousands — sludge buildup, worn bearings, and in extreme neglect a seized engine. If you only track one thing about your car, track this. And write down the mileage every time: "was it 70,000 or 72,000?" is exactly how intervals silently stretch.
Never think about this schedule again
Maintain That! builds your home, vehicle, and equipment maintenance schedule automatically, reminds you before things come due, and keeps every receipt with the record.
Frequently asked questions
Is the 3,000-mile oil change rule still true?
Not for modern cars on synthetic oil. Most manufacturers specify 5,000–10,000 miles. Check your manual — 3,000 miles today mostly benefits the quick-lube industry.
Synthetic vs conventional — does it change the interval?
Yes. Full synthetic protects longer (typically 7,500+ miles) and handles heat better. Most vehicles built since the mid-2010s specify synthetic from the factory.
My car barely gets driven. Do I still need oil changes?
Yes — change at least annually. Oil accumulates moisture and acids even with few miles, especially with short trips that never fully heat the engine.
How do I remember when the next change is due?
Log the date and mileage each time, then track against both. Maintain That! schedules the next change by date and mileage automatically and keeps the receipt with the record.