How To Change Oil In Generator

If you’re like most people, you probably don’t know how to change the oil in a generator. That’s okay – it’s not a task that everyone needs to know how to do. But if you do need to know, read on for instructions on how to do so.

It’s not difficult, but there are a few things you’ll need to have on hand before you get started. And remember, always follow the manufacturer’s recommendations when it comes to changing the oil in your generator. Happy tinkering!

How To Change Oil In Generator?

Tools and Materials Needed:

  • Oil
  • Filter
  • Funnel (optional)
  • Rags or paper towels


Heat the Old Oil

Locate the oil drain plug on the bottom of the generator. It’s usually on the side near the ground. Place a drip pan or old rag underneath the plug to catch the used oil.

Place Generator on Blocks

If your generator doesn’t have a built-in oil drain, you’ll need to place it on blocks to get the drain plug near the ground.


Be sure to consult your generator’s owner’s manual before performing any maintenance.

How To Change Oil In Generator

Drain the Oil

Remove the oil fill cap and unscrew the drain plug with a wrench. Allow the oil to drain completely. Furthermore, If your generator has an oil filter, remove it and discard it according to the manufacturer’s instructions.

Replace the Old Oil Filter

If your generator has an oil filter, install a new one. Be sure to consult your owner’s manual for the correct type of filter to use.

Fill With New Oil

Refer to your owners manual for the recommended type and amount of oil to use. Fill the generator with fresh oil until it reaches the full mark on the dipstick.

Replace the Oil Drain Plug

Screw the oil drain plug back in and tighten with a wrench.

Reconnect Spark Plug Wire

If you disconnected the spark plug wire to prevent accidental starting, reconnect it now.

Start Generator and Check for Leaks

Start the generator and let it run for a few minutes to circulate the oil. Check for leaks around the drain plug and oil fill cap. Furthermore, If you see any leaks, shut off the generator and investigate further.

Add Stabilizer to New Oil

If you’ll be storing the generator for an extended period of time, add a fuel stabilizer to the new oil. Moreover, This will help prevent deterioration and keep the oil fresh.

There you have it – changing the oil in a generator is a pretty simple task. Just be sure to follow the manufacturer’s recommendations and take all necessary safety precautions, and you’ll be fine.


How often should I change the oil?

Most manufacturers recommend that you change the oil every 50 hours of use, or once a year – whichever comes first. However, it’s always a good idea to check your owner’s manual to be sure.

What Kind of Oil Does My Generator Need?

Again, it’s best to consult your owner’s manual. However, most generators will require either 10W-30 or SAE 30 oil.

Do Portable Generators Come With Oil?

No, they do not. You will need to purchase oil separately.

Can I Run My Generator Without Oil?

No, you should never run your generator without oil. Doing so will damage the engine and void your warranty.


As with any maintenance task, there are a few precautions you should take when changing the oil in your generator. Firstly, be sure to consult your owner’s manual before doing anything. Second, make sure the generator is turned off and cooled down before proceeding. And finally, always use caution when working with tools and chemicals.


Changing the oil in your generator is an important part of regular maintenance. Moreover, Not only will it help keep your generator running smoothly, but it will also help extend its life. Follow these simple steps to change the oil in your generator in no time!

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