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How Often Should You Change Your Oil?
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 answerOur 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.See our oil change service QuestionsOil 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. About the authorChristian owns New Level Auto Service in Rockville, MD. He has more than 20 years of experience working on cars and has run the shop for over 10 years. The shop is a licensed Maryland State Inspection station with ASE-certified mechanics who work on all makes and models. More about our shop. Bring your car to New Level Auto ServiceWe're at 716 E Gude Dr in Rockville, MD. Walk-ins are welcome, and calling ahead gets you in faster.Phone (301) 762-1200Hours Monday to Friday 8 AM to 5 PM, Saturday 9 AM to 2 PMExtras Night drop and 24-hour emergency towingCall nowDirections
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Car Troubleshooting
10 Signs Your Car Needs a Checkup (and How Urgent Each One Is)
It's time for a car checkup when you notice a warning light, brakes that feel or sound different, new noises, vibration or pulling, loss of power, hard starting, worse gas mileage, fluid leaks, or smoke and strange smells. Some of these can wait a week or two. A flashing check engine light, a red warning light, a sinking brake pedal, or smoke means stop driving. Quick answerStop driving: flashing check engine light, red oil or temperature light, a soft or sinking brake pedal, smoke or steam.Within a few days: grinding brakes, a steady check engine light, clunks, pulling, hard starting.Soon: small leaks, slowly dropping gas mileage, mild vibration at highway speed.Each sign points to a specific system, so tell the mechanic exactly when it happens. How urgent is each warning sign? We sort warning signs into three levels. Stop driving means pull over when it's safe and call for help, because driving on can cause major damage or put you at risk. Within a few days means the car is usually drivable for now, but the problem can get worse or more expensive to fix. Soon means book a visit in the next week or two. When in doubt, call and describe what's happening. Warning lights and brake changes 1. The check engine light is on or flashing What it usually means: the engine computer found a fault. It can be something small like a loose gas cap, or a failing sensor, a misfire, or a catalytic converter problem. How urgent: a steady light means within a few days. A flashing light means an active misfire that can overheat the catalytic converter, so stop driving. See our check engine light service. 2. Other dashboard warning lights What it usually means: red lights such as oil pressure, engine temperature, or the BRAKE light point to problems that can quickly damage the engine or affect stopping. Yellow lights like ABS or tire pressure are less urgent. A tire pressure light often means one tire is low or a sensor has failed. How urgent: red lights mean stop driving. Yellow lights mean within a few days. We handle tire pressure sensors and ABS problems. 3. Brakes squeal, grind, or feel soft What it usually means: a steady squeal is often the pad wear indicator. Grinding usually means metal on metal. A soft or sinking pedal points to a fluid leak, air in the lines, or a master cylinder problem. How urgent: a soft or sinking pedal means stop driving. Grinding means within a few days. See brake repair. Noises, vibration, and pulling 4. New clunks, clicks, or rumbles What it usually means: a clunk over bumps often points to worn suspension parts like sway bar links, ball joints, or struts. A clicking sound when turning is a classic sign of a worn CV axle. A loud rumble from under the car often means an exhaust leak. How urgent: within a few days. Related services: steering and suspension, CV axle repair, and exhaust and muffler repair. 5. Vibration or pulling to one side What it usually means: vibration at highway speed is often an out-of-balance tire. Pulling can come from uneven tire pressure, alignment, or worn steering parts. Vibration only when you brake usually points to the rotors. How urgent: soon for mild vibration. Within a few days for strong pulling or shaking. Start with steering and suspension. Power, starting, and fuel economy 6. Loss of power or hesitation What it usually means: misfires from worn spark plugs or coils, a clogged fuel filter, a weak fuel pump, or a sensor giving bad readings. How urgent: within a few days. Stop driving if it can't keep up with traffic safely. See fuel pump replacement. 7. Hard starting What it usually means: a slow crank usually means a weak battery or corroded cables. A single click can be the battery or the starter. If the engine cranks normally but won't start, the problem is more likely fuel or ignition. How urgent: within a few days, before it leaves you stranded. See battery, alternator, and starter service. 8. Worse gas mileage What it usually means: low tire pressure, a dirty air filter, worn spark plugs, a lazy oxygen sensor, or a brake that's dragging. How urgent: soon. A tune-up often brings mileage back. Leaks, smoke, and strange smells 9. Fluid under the car What it usually means: brown or black and slick is usually engine oil. Green, orange, or pink with a sweet smell is coolant. Clear to amber and slippery near a wheel may be brake fluid. Clear water under the front on a hot day is normal A/C condensation. How urgent: brake fluid means stop driving. Coolant means within a few days. A small oil drip means soon. See cooling system repair and engine repair. 10. Smoke, steam, or strange smells What it usually means: steam and a sweet smell mean coolant, often from an overheating engine. Burning oil smells like hot cooking oil. A rotten egg smell often points to the catalytic converter. A musty smell from the vents usually comes from the A/C system. How urgent: smoke, steam, or exhaust smell inside the cabin means stop driving. Exhaust inside the car can contain carbon monoxide. A musty vent smell can wait. See auto A/C repair. What should you tell the mechanic? The more specific you are, the faster the problem gets found. Before you come in, try to note: When it happens: cold or warm engine, at what speed, and while braking, turning, or accelerating Where the noise or smell seems to come from Whether a warning light came on and if it stayed on A short phone video of the noise, if you can record it safely Don't clear warning lights before the visit. The stored codes help pinpoint the cause. You can see everything we work on on our services page. Something feels off but you're not sure what?Our ASE-certified mechanics scan the car, check the system behind the symptom, and explain what's urgent and what can wait, in English or Spanish.See computer diagnostics QuestionsCar checkup FAQHow often should a car get a checkup?Follow the maintenance schedule in your owner's manual, and have a mechanic look over the brakes, tires, and fluids at each oil change. Any of the signs above is a reason to come in sooner.Is it safe to drive with the check engine light on?If the light is steady and the car drives normally, it's usually OK to drive to a shop soon. If the light is flashing, stop driving, because an active misfire can damage the catalytic converter.What does a car checkup include?A good checkup usually covers brakes, tires, fluids, belts and hoses, the battery, lights, and suspension, plus a computer scan if a warning light is on.Can I bring my car in without an appointment?Yes. Walk-ins are welcome, and calling ahead at (301) 762-1200 gets you in faster. We also have a night drop.Do you work on all makes and models?Yes. Our ASE-certified mechanics work on all makes and models, and we speak English and Spanish. About the authorChristian owns New Level Auto Service in Rockville, MD. He has more than 20 years of experience working on cars and has run the shop for over 10 years. The shop is a licensed Maryland State Inspection station with ASE-certified mechanics who work on all makes and models. More about our shop. Bring your car to New Level Auto ServiceWe're at 716 E Gude Dr in Rockville, MD. Walk-ins are welcome, and calling ahead gets you in faster.Phone (301) 762-1200Hours Monday to Friday 8 AM to 5 PM, Saturday 9 AM to 2 PMExtras Night drop and 24-hour emergency towingCall nowDirections
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