What happens when you change your oil yourself

Changing your own oil means draining the old oil from your engine, replacing the oil filter, and adding fresh oil back in. You do this work under the car, so you'll need a safe way to lift it — either ramps or a jack with jack stands. The whole job usually takes 30 minutes to an hour once you have the right tools and know where everything is on your engine.

Most people change their oil because it costs less than a shop visit — you pay only for the oil and filter, not labor. You also know exactly what went into your car and when. The main trade-off is that you're responsible for disposing of the old oil safely, and if something goes wrong during the work, you can't call the shop to fix it.

Before you start, check your owner's manual for the oil type your engine needs, how much oil it holds, and where the drain plug and filter are located. Different cars vary widely, and using the wrong oil can damage your engine.

Key Takeaways

  • You need a way to safely lift the car (ramps or jack with stands), a wrench to fit your drain plug, an oil filter wrench, a drain pan, and the correct oil and filter for your car.
  • The basic steps are: lift the car, drain the old oil into a pan, remove and replace the filter, lower the car, add new oil, and check the level with the dipstick.
  • Old oil must be taken to a recycling center, auto parts store, or quick-lube shop — never pour it down a drain or into the ground.
  • You should change your oil at the interval listed in your owner's manual, which varies by car and oil type but is often 5,000 to 10,000 miles.

Tools and materials you'll need

Start by gathering everything before you get under the car. You need a way to lift the vehicle safely — either ramps (which you drive onto) or a hydraulic jack paired with at least two jack stands. Never rely on a jack alone; it can fail and the car can fall on you. A floor jack is faster than ramps but requires more skill to use safely.

You'll also need a wrench or socket that fits your drain plug (usually 13mm, 14mm, or 15mm), an oil filter wrench to remove the old filter, and a drain pan large enough to hold all your old oil without spilling. A funnel that fits your oil filler cap makes pouring new oil cleaner. Finally, buy the oil and filter specified in your owner's manual — bring the manual or your car's year, make, and model to an auto parts store and they'll tell you exactly what to get.

Optional but helpful: old rags or paper towels, a creeper (a low wheeled board you lie on), and a flashlight if you're working in dim light.

Step-by-step process for draining and replacing the filter

First, warm up your engine by running it for a minute or two, then turn it off. Warm oil flows faster than cold oil. Put on safety glasses and gloves, then use your ramps or jack to lift the car safely. If you use a jack, place the stands under the frame and lower the car onto them before getting underneath.

Locate the drain plug on the bottom of the engine — it's a bolt sticking down. Place your drain pan underneath it, then use your wrench to turn the plug counterclockwise. Once it's loose enough, unscrew it by hand (carefully, it may still be warm) and let the oil drain completely into the pan. This takes 5 to 10 minutes. While the oil drains, locate the oil filter — it's a cylindrical canister usually on the side of the engine.

Once the oil has stopped dripping, wipe the drain plug clean with a rag and screw it back in by hand until it's snug, then tighten it with your wrench. Don't over-tighten; you just need it tight enough that it won't leak. Now remove the old filter by turning it counterclockwise with your filter wrench. Oil will spill out, so keep the drain pan underneath. Once it's off, wipe the filter mounting surface clean with a rag.

Take your new filter and coat the rubber gasket (the ring on top) lightly with fresh oil. Screw the new filter on by hand until the gasket touches the engine, then turn it another three-quarters of a turn. Don't use the wrench for this — hand-tight is correct.

Adding new oil and checking the level

Lower the car back to the ground using your ramps or jack. Open the hood and locate the oil filler cap on top of the engine — it usually has an oil can symbol on it. Unscrew the cap and set it aside. Insert your funnel into the opening and slowly pour in the amount of oil your manual specifies. Most cars hold between 4 and 6 quarts.

Once you've added the oil, replace the cap. Start the engine and let it run for 30 seconds to a minute so the new oil circulates through the filter. Then turn the engine off and wait two minutes for the oil to settle back into the pan. Pull out the dipstick (a long thin rod with markings on it), wipe it clean on a rag, reinsert it all the way, then pull it out again and check the level. The oil should reach the "full" mark. If it's low, add a little more and check again.

Once the level is correct, you're done. The old oil in your drain pan needs to be recycled — take it to an auto parts store, a quick-lube shop, or a hazardous waste recycling center. Many auto parts stores accept old oil for free.

Common mistakes that cause problems

The most common error is over-tightening the drain plug or filter. A drain plug that's too tight can strip the threads in the pan, which means it will leak forever and cost hundreds to fix. Tighten it snugly with a wrench, then stop. For the filter, hand-tight plus three-quarters of a turn is the rule — using a wrench to tighten it will damage the gasket and cause a leak.

Another frequent mistake is forgetting to coat the new filter's gasket with oil before installing it. Without that thin coat, the gasket won't seal properly and oil will leak out. It's a small step that takes five seconds and prevents a mess.

Some people also add too much oil, thinking more is better. Overfilled oil can damage the engine by foaming up and not lubricating properly. Stick to what your manual says and check the dipstick to confirm.

When to change your oil and what affects the interval

Your owner's manual lists the oil change interval for your specific car — this is the mileage or time between changes. Older cars often needed an oil change every 3,000 miles, but modern engines with synthetic oil can go 7,500 to 10,000 miles or even longer. Some newer cars use 0W-20 or 0W-30 synthetic oil and can go 10,000 miles between changes; others still need conventional oil changed every 5,000 miles.

The interval depends on your engine design, the type of oil you use, and your driving habits. Frequent short trips, towing, or driving in dusty conditions can shorten the interval. Check your manual for the recommendation that matches your situation, and follow that schedule. Changing oil more often than recommended doesn't hurt, but changing it less often risks engine damage.

Many people track their oil changes by writing the date and mileage on a sticker and placing it inside the driver's door jamb. This makes it straightforward to remember when the next change is due.

Frequently Asked Questions

Can I change my oil if I don't have a garage or driveway?

You need a flat, level surface and enough space to get under the car safely. A driveway or garage is ideal, but some apartment complexes have designated maintenance areas. Check with your landlord or property manager. Never work on a slope or in a parking lot where the car might roll.

What should I do if I spill oil on the ground?

Contain it when ready with sand, kitty litter, or absorbent material to prevent it from spreading. Once it's absorbed, sweep it up and dispose of it as hazardous waste. Oil on soil or pavement can seep into groundwater, so clean it up thoroughly and don't leave it sitting.

How do I know if I'm using the right oil type?

Open your owner's manual and look for the oil specification — it will be something like "5W-30" or "0W-20." The manual also lists the total capacity. Take this information to an auto parts store and ask for the correct oil and filter. Staff can confirm you have the right products before you buy.

Is it safe to change my oil if I've never done it before?

Yes, if you take time to learn the steps and work carefully. Watch a video specific to your car's year and model, read through the manual, and don't rush. The biggest risks are lifting the car unsafely or over-tightening bolts. Use proper jack stands, tighten by feel rather than force, and ask an experienced friend to watch your first time if possible.

What if the old filter is stuck and won't turn?

Tap the filter wrench gently with a hammer to break the seal, or try wrapping a rubber band around the filter for better grip. If it's still stuck, you can carefully poke a screwdriver through the filter and use it as a lever — just be careful not to puncture the engine block underneath. As a last resort, a quick-lube shop can remove it for you.