How often to change oil: miles, months and oil type

How often should you change your oil?

How often to change oil is set by the car's maker, not by the oil change shop. Consumer Reports (updated September 2026) says many automakers now specify 7,500 or even 10,000 miles and six or 12 months between changes, roughly 12,000 to 16,000 km, and calls the old every-3,000-miles rule outdated because engines and oils have improved.

Every oil change interval has two limits, a distance and a time, and the oil is due at whichever arrives first. Oil wears out with heat and distance, but it also ages with time, collecting moisture and impurities, which is why a car that sits still reaches its date. A car that covers 25,000 miles a year meets the distance limit; a car that covers 4,000 meets the date.

The interval in the manual assumes the oil the manual specifies. Hyundai's 2025 Sonata owner's manual states it plainly: the normal interval is based on the recommended oil specification, and if that oil is not used, the engine oil goes on the severe schedule. This article is about cars; for two wheels, see how often to change motorcycle oil.

How often are you supposed to change your oil, by oil type?

How often you are supposed to change your oil depends less on the bottle than on what the engine was designed for. A viscosity grade such as 0W-20 describes how thick the oil is cold and hot, and the manual names the grade and the specification the engine needs. The interval is attached to that combination, which is why the same synthetic oil gets a different interval in two different engines.

Using the specified grade also matters at the pump. fueleconomy.gov says the recommended grade can improve gas mileage by 1% to 2%, and that a thicker grade than the engine was designed for can lower it by 1% to 2%, the size of the penalty depending on how far the grade is off. It also advises looking for oil marked Energy Conserving on the API symbol.

Sources: Toyota Tech Tip T-TT-0262-13 (February 2014, filed with NHTSA), Consumer Reports (2026), Valvoline, Hyundai, all accessed November 2026. No opened source gives a separate figure for synthetic blend oil: the manual decides.

What do carmakers actually specify?

Carmakers publish their oil change intervals in the owner's manual and the warranty and maintenance guide, and the numbers differ by brand, model and model year. The table below collects what the documents opened for this article say, with the year of each document. Use it to see the range, then look up the schedule for the exact car.

Two patterns show in these schedules. Where a maker publishes both figures, as Toyota does for its 0W-20 engines and Subaru does, the severe interval is about half the normal one. And every interval pairs a distance with a time: some makers state the time limit in the schedule itself, others, like Ford, build it into an oil life monitor that counts down on the dashboard.

Sources: Toyota, Subaru of America (March 2014), Subaru support, Ford, Gardner Business Media (2013, on GM), Honda Canada, Hyundai, accessed November 2026.

Is the 3,000-mile oil change a myth?

For most modern cars, yes: the 3,000-mile oil change is a habit, not a requirement. Consumer Reports calls the every-3,000-miles-or-three-months rule outdated, and none of the normal schedules in the carmaker table above is that short. Toyota's 2014 guidance gave its 0W-20 engines 10,000 miles, and Subaru's normal interval is 6,000.

The cost of the habit adds up. Consumer Reports puts the saving at $600 over two years and 30,000 miles at $100 a change. The arithmetic behind it: 30,000 miles is ten changes at 3,000 miles and four at 7,500 miles, six fewer visits to the shop.

The 3,000-mile figure still survives in one place: severe service. Subaru's severe interval for 2015 and later models is 3,000 miles and 3 months, according to a Subaru of America announcement from March 2014. A car that only makes short winter trips may genuinely need the short interval, and the manual says when.

Should you follow the oil life monitor or the mileage?

Follow the oil life monitor if the car has one, and treat the manual's time limit as a ceiling it cannot extend. An oil life monitor is the car computer's estimate of how much useful life the oil has left, calculated from how the car is driven. Honda says its Maintenance Minder calculates from speed, temperature and how long the car runs under more severe conditions, and shows Service Due Soon at 15% oil life.

Ford describes its Intelligent Oil Life Monitor as counting from 100% to 0% while weighing engine temperature, idling and towing. A car that idles a lot may be told to change oil at 7 months or 4,000 miles, and the estimate may or may not reach a full 12 months or 10,000 miles.

A monitor only knows what it is told. Honda notes that the Minder has no sensors for wear caused by heavy trailer towing, and Hyundai says its system works only with the recommended oil and must be reset at every oil change, or its reading may not be accurate.

• Reset it after every change. A monitor that is not reset keeps counting from the previous oil, and one reset by mistake counts from a change that never happened.
• Respect the calendar. GM's manuals for some models call for oil and filter at least once a year even when the monitor has not asked for service.
• Check the level yourself. A percentage of oil life says nothing about how much oil is in the engine; Honda states that its Minder does not monitor the oil level.

How often to change oil if you don't drive much?

If you don't drive much, change the oil on the time limit in the manual, usually every 6 or 12 months, even though the car has not covered the distance. Consumer Reports gives the example of a driver covering 6,000 miles a year on a car with a 7,500-mile interval: that car should still have its oil changed twice a year.

GM's owner's manuals for the 2010-2012 four-cylinder Chevrolet Equinox, GMC Terrain, Buick Regal and LaCrosse tell owners to change the oil and filter at least once per year, while the oil life monitor may not ask for service that often, as Gardner Business Media reported in 2013. Ford's monitor estimate may or may not reach a full 12 months or 10,000 miles.

Example calculation: a car driven 4,000 miles a year on a 10,000-mile, 12-month schedule reaches the 12-month limit at about 4,000 miles, so the oil is due on the date with 6,000 miles of the distance limit unused. Low annual mileage also tends to mean short trips, and short trips are on Hyundai's and Toyota's severe-service lists. Logged engine data on how long a car takes to warm up shows why: a short trip below freezing can end before the engine is warm.

What counts as severe driving for an oil change?

Severe service is the set of driving conditions under which a maker shortens its maintenance intervals; Toyota and Subaru halve the oil interval. The list is longer than most drivers expect, and ordinary commuting in traffic qualifies. Hyundai's 2025 Sonata manual gives one of the most complete lists, and Toyota's 2014 Tech Tip names its own Special Operating Conditions, under which oil is replaced every 5,000 miles regardless of the oil used.

Age counts too. Hyundai's 2025 Sonata manual tells owners to use the severe maintenance schedule after more than 10 years or 100,000 miles, whatever the driving. The same manual notes that some oil consumption is normal, so an older engine needs its level checked regularly.

Sources: Hyundai 2025 Sonata owner's manual, Toyota Tech Tip T-TT-0262-13 (2014), accessed November 2026. The reasons in the last column are general workshop knowledge, not quotes from either document.

How often to change synthetic oil?

Change synthetic oil at the interval the manual gives for that engine, which can be longer than for conventional oil only when the maker says so. Toyota extended its interval to 10,000 miles for most vehicles that require 0W-20 synthetic, but engines where 0W-20 is only an option to a thicker grade stay at 5,000 miles even if 0W-20 is used, according to its 2014 Tech Tip.

Synthetic oil also ages. A mechanic quoted by Consumer Reports warns not to stretch synthetic oil past the maker's time limit, typically six months or a year for a car that covers few miles or makes many short trips. Consumer Reports adds that synthetic costs two to four times as much as conventional oil.

Synthetic does protect better in the lab. AAA found in 2017 that synthetic oils performed an average of 47 percent better than conventional oils across eight industry-standard ASTM tests, while noting that only a limited number of vehicles specifically require synthetic. AAA put the average change at $38 for conventional and $70 for synthetic, a $32 difference per change.

What is a high mileage oil change?

A high mileage oil change is an ordinary oil change done with an oil formulated for older engines. Valvoline, which sells it, says many experts recommend high-mileage oil after 75,000 miles, and formulates its products with seal conditioners to reduce oil consumption and leaks in engines past that mark. That is the maker's description of its own product, and the oil still has to match the grade in the manual.

High-mileage oil does not change how often the oil is due. What changes with age is the schedule: Hyundai's 2025 Sonata manual moves the car onto its severe maintenance schedule after 10 years or 100,000 miles. An older engine that burns or seeps oil also needs its level checked more often, whatever is in it.

How often to change the oil filter?

Change the oil filter at every oil change. The carmakers' own schedules pair the two: Subaru's 2014 schedule lists engine oil and engine oil filter replacement together every 6 months or 7,500 miles, GM's manuals for several 2010-2012 models call for oil and filter at least once a year, and Hyundai's manual tells owners to have the engine oil and filter changed together.

The filter holds the dirt, metal and soot the oil has carried out of the engine. Pouring fresh oil through an old filter starts the new oil's life with the old oil's debris in its path. If a manual ever schedules the filter differently, the manual wins; otherwise change both together.

How often should you check your oil level?

Check the oil level at least once a month, or ideally every other fill-up, as Consumer Reports advises. Most automakers recommend checking with the engine cool. Pull the dipstick, wipe it, push it fully back in, pull it again and read where the oil sits between the two marks. If it is low, add no more than half a quart at a time and check again.

Some oil consumption is normal. Hyundai's manual says it is normal for engine oil to be consumed during driving and asks owners to check the level regularly, because its oil life system assumes the oil is being topped up normally. Toyota keeps a 5,000-mile visit on its 10,000-mile oil schedule partly so the fluid levels, engine oil included, are checked and adjusted.

The colour on the dipstick is a weaker signal than the level. Consumer Reports notes that used oil can look brown or black, so dark oil alone does not mean the oil is due. A level that keeps dropping between changes, or oil that looks milky, is a reason to have the engine checked rather than just topped up.

Do hybrids and electric cars need oil changes?

Hybrids need oil changes, because they have a gasoline engine; electric cars do not, because they have no engine oil. Toyota's 2014 Tech Tip lists the 2010-2014 Prius with 0W-20 synthetic oil and a 10,000-mile interval under normal use, the same as its other 0W-20 engines. The engine in a hybrid often runs in short bursts, so the severe-service list deserves a second look.

An electric car still has fluids and a schedule of its own, from brake fluid to coolant for the battery. The EV maintenance schedule covers what an electric car needs, and hybrid car maintenance covers the rest of a hybrid's list.

What does a sample oil change plan look like?

Here is an example for a car on a 10,000-mile, 12-month normal schedule, driven 8,000 miles a year, most of it short trips through a cold winter. The short winter trips put it on the severe schedule for those months, so the plan halves both limits to 5,000 miles or 6 months, the same halving Toyota and Subaru apply to their severe schedules. Adjust the numbers to the car's own manual.

WrenchTime, a maintenance and fuel log for iPhone, schedules a job by date, by distance or both and treats whichever comes first as the one that matters, and its vehicle card shows an oil life bar worked out from the distance and time since the last oil change. Keeping each receipt is covered in which car maintenance records to keep.

• At the oil change. Record the date and the odometer reading, change the filter, and reset the oil life monitor.
• Once a month. Check the oil level with the engine cool and top up half a quart at a time if needed.
• Before winter. Decide which schedule applies: mostly short cold trips means severe service, so the next change is due in 6 months or 5,000 miles, whichever comes first.
• When the monitor or the date arrives. Book the change at the first of the two; a reading of 15% on a Honda, for example, is the signal to plan it.
• Once a year at the latest. Change oil and filter even if the monitor has not asked, unless the manual gives a longer time limit.

Keep the date and the odometer on the same reminder

An oil change is due at a date or a mileage, whichever arrives first, so a reminder that tracks only one of them misses half the rule. In WrenchTime the oil change and the oil filter are procedures in the Care tab, scheduled by date, by distance or both, with a reminder that fires on the date or at the odometer reading, a few days ahead if you choose. Make it a recurring series and completing one change queues the next.

Completing it records the date, the odometer, the cost and the invoice, which is the service record a buyer or a warranty claim asks for. The free version covers 1 vehicle and 2 maintenance entries a month, enough for oil changes on one car. The guide on how to schedule maintenance and reminders in WrenchTime walks through the screens.