The answer depends on your car's make, model, and year — check your owner's manual first
Oil change intervals have changed dramatically over the last 15 years. Older cars often needed an oil change every 3,000 miles. Most cars made after 2010 can go 5,000 to 10,000 miles between changes, and some newer vehicles stretch to 15,000 miles or more. The only source that matters is your owner's manual, because manufacturers test their own engines and set intervals based on how that specific engine handles oil breakdown.
Your manual lists two intervals: one for "normal" driving and one for "severe" driving. Normal driving means mostly highway miles at steady speeds. Severe driving includes frequent short trips, towing, dusty conditions, or lots of idling — situations where oil breaks down faster. If you do any severe driving, use that interval instead.
Synthetic oil lasts longer than conventional oil, which is why many modern cars can go longer between changes. If your manual says you can use either type, synthetic costs more upfront but means fewer changes over time. Some cars require synthetic; your manual will say so.
Key Takeaways
- Your owner's manual lists the exact interval for your car — this is the only number that matters, not what worked for someone else's vehicle.
- Most cars made after 2010 go 5,000 to 10,000 miles between oil changes, but some newer models can go 15,000 miles or longer.
- If you do severe driving (short trips, towing, dusty roads, frequent idling), use the severe interval from your manual, not the normal one.
- Synthetic oil lasts longer than conventional oil, so if your manual permits either type, synthetic reduces how often you need to change oil.
Where to find your car's oil change interval
Open your owner's manual and look for the "Maintenance Schedule" or "Service Schedule" section. This table lists every maintenance task and how often to do it. The oil change interval will be listed in miles and sometimes also in months — use whichever comes first.
If you don't have a physical manual, you can find it online. Search "[your car's year, make, model] owner's manual PDF" or visit the manufacturer's website. Most manufacturers let you read manuals for free. Some newer cars also display the interval on the dashboard or in the infotainment system; check your car's screen after starting the engine.
If you're buying a used car and the manual didn't come with it, ask the dealer or previous owner for a copy, or read one before you drive it home. Knowing the interval matters for your budget and for keeping the engine healthy.
Normal versus severe driving — which one applies to you
Your manual defines severe driving, and it's often broader than people think. Severe driving includes any of these: trips under 10 miles most of the time, frequent idling or stop-and-go traffic, towing a trailer or carrying heavy loads, driving in dusty or sandy conditions, or driving in very hot or very cold climates. If even one of these describes your situation, you're doing severe driving.
Many people who think they drive normally actually drive severely. A person who makes five short trips to run errands, or who commutes in city traffic, or who lives somewhere cold, should use the severe interval. Using the normal interval when you drive severely can shorten your engine's life because the oil breaks down faster under those conditions.
If you're unsure, use the severe interval. Changing oil more often than necessary costs money, but it won't hurt your engine. Changing it less often than necessary can cause damage that costs thousands to repair.
Conventional oil versus synthetic oil — how it affects your interval
Conventional oil is refined from crude oil and breaks down over time as it circulates through your engine. Synthetic oil is chemically engineered to resist breakdown longer, which is why it lasts through more miles before needing replacement. If your manual says you can use either type, synthetic oil means you can go longer between changes.
The cost difference matters. Conventional oil changes typically cost $30 to $75, while synthetic oil changes cost $65 to $125 or more. Over a year, if synthetic lets you go 10,000 miles between changes instead of 5,000, you're doing half as many changes. That can save money even though each change costs more.
Some cars require synthetic oil — your manual will state this clearly. Some cars recommend it but allow conventional. A few older cars work better with conventional. Never use a type your manual doesn't permit, because the wrong oil can affect how your engine runs and may void your warranty.
What happens if you skip or delay an oil change
Oil does two things: it lubricates moving parts and it carries away dirt and debris. As oil circulates, it picks up particles and breaks down chemically. After enough miles, it can't do either job well. Driving on old oil increases friction between engine parts, which causes wear and heat buildup.
Skipping one oil change usually doesn't cause when ready damage, but it accelerates wear. Repeatedly going over your interval — changing oil at 7,000 miles when your manual says 5,000, or at 12,000 when it says 10,000 — adds up over the life of the car. The damage is invisible at first, but it shortens how long your engine lasts and can eventually lead to engine failure, which costs $4,000 to $8,000 or more to repair.
Modern engines are tighter and more efficient, which means they're also more sensitive to oil quality. Older cars were more forgiving of slightly overdue changes. If you own a newer car, sticking to the interval matters more.
How to track when your next oil change is due
The simplest method is to write the date and mileage on a sticker and put it on the inside of your driver's door or on the oil filler cap. When you reach the next interval, you'll see it when ready. Many people take a photo of the sticker with their phone so they have a record.
Some cars have a built-in reminder that counts down to your next service. Check your dashboard or infotainment screen — if you see an oil change reminder, that's your car telling you it's time. You can usually reset it after you change the oil.
You can also set a phone reminder or calendar alert for the date when you're due. If you drive 12,000 miles a year and your interval is 6,000 miles, you're due roughly every six months. Setting a recurring reminder takes the guesswork out of it.
Checking your oil level between changes
Oil level is different from oil change interval. Even if you're not due for a change, your engine can lose oil between changes through normal wear, leaks, or burning. Check your oil level once a month or before long trips. A low oil level can damage your engine even if the oil itself is still good.
To check, park on level ground, wait a few minutes after running the engine so the oil settles, then pull out the dipstick (usually a yellow or orange handle under the hood). Wipe it clean, reinsert it fully, then pull it out again and read the level. It should be between the minimum and maximum marks. If it's below minimum, add the type of oil your manual specifies.
If you're losing oil between changes — adding more than a quart between scheduled changes — have a mechanic check for leaks. A slow leak is straightforward to fix early but can cause serious damage if ignored.
Frequently Asked Questions
Can I go longer than my manual says if I drive mostly highway miles?
Highway driving is easier on oil than city driving, but your manual's normal interval already accounts for highway driving. If your manual says 10,000 miles for normal driving and you drive only highways, you're already in the normal category. Don't extend beyond what your manual states — manufacturers set intervals with a safety margin built in.
What if I don't drive much — do I still need to change oil every few months?
Yes. Your manual lists intervals in both miles and months. If you drive very little, use whichever comes first. Oil breaks down over time even when the car sits, so if six months pass before you hit your mileage interval, change it anyway. Stale oil loses its ability to protect your engine.
Is it okay to change oil more often than my manual says?
More frequent changes won't hurt your engine, but it's unnecessary and wastes money. Stick to your manual's interval. If you're concerned about engine health, focus on using the correct oil type and checking your level between changes instead.
Do I need to change my oil more often if I tow a trailer?
Yes. Towing is listed as severe driving in most manuals, which means you should use the severe interval, not the normal one. Towing puts extra load on the engine, which heats the oil and breaks it down faster. Check your manual for the severe interval and follow that instead.
What should I do if I've been going way over my oil change interval?
Change your oil now, then follow your manual's interval going forward. One overdue change usually doesn't cause permanent damage, but don't make it a habit. If you're worried about engine wear, a mechanic can inspect your engine, but the best thing you can do now is get back on schedule.