For most cars, plan an oil change every 5,000 miles or every six months, whichever comes first, unless your owner’s manual says otherwise. Many newer cars on full synthetic oil can go 7,500 to 10,000 miles between changes. If you drive a lot of short trips, sit in heavy traffic, or tow, change it sooner.
Quick answer
- Our rule of thumb at New Level Auto Service: every 5,000 miles or six months, whichever comes first, or whatever your owner’s manual says.
- Conventional oil usually runs 3,000 to 5,000 miles. Full synthetic often runs 7,500 to 10,000 miles.
- Oil breaks down with time too, so change it at least twice a year even if you barely drive.
- Check your oil level once a month. Low oil is a bigger risk than old oil.
- A red oil pressure light means pull over and shut the engine off.
How often should you change your oil?
The honest answer is: it depends on your car, the oil it uses, and how you drive. The owner’s manual is the first place to look, because the engineers who built your engine set that interval for a reason.
At our shop in Rockville, our general recommendation is every 5,000 miles or every six months, whichever comes first. That is a safe middle ground for most cars and most drivers around Montgomery County. If your manual gives a longer interval and you drive mostly highway miles, it is fine to follow the manual.
Here are the typical ranges you will see:
- Conventional oil: about 3,000 to 5,000 miles.
- Synthetic blend: about 5,000 to 7,500 miles.
- Full synthetic: about 7,500 to 10,000 miles, and some manufacturers allow more.
Many newer cars have an oil life monitor on the dash that calculates when the oil is due based on how the engine is actually used. Those monitors are generally reliable. Just don’t let the car go past a year without a change, even if the monitor still shows oil life left.
Do short trips and stop-and-go traffic change the interval?
Yes. Most owner’s manuals list a “severe service” schedule, and a lot of everyday driving around the DC area actually fits it. Severe service usually includes:
- Lots of short trips under 10 miles, where the engine never fully warms up.
- Heavy stop-and-go traffic, like rush hour on I-270 or Rockville Pike.
- Towing, hauling heavy loads, or a roof box on long trips.
- Extreme heat, extreme cold, or dusty roads.
- Lots of idling, such as delivery or rideshare driving.
Short trips are the one people miss. When the engine doesn’t get fully hot, moisture and fuel collect in the oil and break it down faster. If most of your driving is a few miles to work and back, stick closer to the shorter end of the range.
Conventional vs. synthetic oil: which one does your car need?
Use the type and viscosity listed in your owner’s manual or on the oil filler cap, such as 0W-20 or 5W-30. That matters more than anything else. Many newer engines require full synthetic, and using the wrong oil in those engines can cause problems.
- Conventional oil is refined from crude oil. It works fine in many older, simpler engines, but it breaks down faster.
- Synthetic blend mixes conventional and synthetic oil. It holds up better than conventional and is common on trucks and SUVs.
- Full synthetic resists heat, flows better when cold, and lasts longer. Most turbocharged engines and many late-model cars call for it.
- High-mileage oil is made for engines with roughly 75,000 miles or more. It has additives that help condition seals and can slow small leaks or oil burning.
If your car calls for conventional oil, switching to synthetic is generally fine and gives extra protection. Going the other way, from synthetic to conventional, is not a good idea when the manual specifies synthetic.
What are the signs you’re overdue for an oil change?
A car won’t always tell you the oil is old. That is why following a schedule matters. Still, these are common signs that it’s time, or past time:
- The oil change or maintenance reminder is on, or the oil life monitor reads low.
- The oil on the dipstick is dark, gritty, or below the “add” mark.
- The engine sounds louder than usual, with more ticking or tapping, especially on startup.
- You smell oil or burning inside the car, which can mean a leak dripping on hot parts.
- You see oil spots on your driveway or parking space.
- It has been more than six months since the last change, even with low miles.
The red oil pressure light (the little oil can symbol) is different. It means the engine is not getting enough oil pressure right now. Pull over when it’s safe, shut the engine off, and check the level. Driving with that light on can ruin an engine in minutes. If the check engine light comes on along with it, don’t keep driving.
How do you check your oil level?
Checking your oil takes two minutes, and doing it once a month catches problems early. Here’s how on most cars with a dipstick:
- Park on level ground. Turn the engine off and wait 5 to 10 minutes so the oil drains back down.
- Open the hood and find the dipstick. It usually has a yellow or orange loop handle.
- Pull it out, wipe it clean with a paper towel, and push it all the way back in.
- Pull it out again and look at where the oil sits between the two marks.
- If it’s at or below the low mark, add the correct oil a little at a time and recheck.
Fresh oil is amber and see-through. Old oil is dark and thick. Milky or foamy oil is a warning sign that coolant may be getting into the oil, and that needs a mechanic’s look right away. It can point to a head gasket problem that calls for engine repair. Some newer cars don’t have a dipstick at all and show the oil level in the dash menu instead. Your owner’s manual will explain how to read it.
What happens during an oil change?
A proper oil change is more than draining and refilling. The old oil is drained, the oil filter is replaced, the drain plug is reinstalled with a fresh gasket when needed, and the engine is refilled with the right amount and type of oil. The filter is just as important as the oil. A clogged filter lets dirt circulate through the engine.
It’s also a good chance to check the rest of the car. When we do an oil change, we can check fluid levels and let you know if we spot leaks, worn belts, or anything else worth watching. Keeping a simple record of each change, with the date and mileage, makes it easy to know when the next one is due. See what’s included on our oil change service page, or look at our tune-ups if your car is also due for broader maintenance.
Due for an oil change in Rockville?
Our ASE-certified mechanics use the oil type and grade your manufacturer calls for, replace the filter, and check your fluids while the car is in.
Oil change FAQ
Is it OK to go 10,000 miles without an oil change?
Only if your owner’s manual allows it and the car uses full synthetic oil. For conventional oil or severe driving conditions, 10,000 miles is too long, and we recommend every 5,000 miles or six months as a safe general rule.
Do I need an oil change if I barely drive?
Yes. Oil breaks down with time, moisture, and short trips, not just miles. Change it at least every six months to a year even if the mileage is low.
Can I switch from conventional to synthetic oil?
Yes, that is generally safe and gives the engine better protection. Just use the viscosity your owner’s manual lists, such as 0W-20 or 5W-30.
What does the red oil light mean?
It means low oil pressure, and the engine may be running without enough oil. Pull over safely, turn the engine off, and check the oil level before driving any farther.
Do you need an appointment for an oil change?
No. Walk-ins are welcome at our Rockville shop, but calling ahead at (301) 762-1200 gets you in faster.
Bring your car to New Level Auto Service
We’re at 716 E Gude Dr in Rockville, MD. Walk-ins are welcome, and calling ahead gets you in faster.
- Phone (301) 762-1200
- Hours Monday to Friday 8 AM to 5 PM, Saturday 9 AM to 2 PM
- Extras Night drop and 24-hour emergency towing