Oil Level of Generator

For the normal working of a generator, it is essential to check the oil level of your generator regularly. The most important aspect to find the exact capacity of oil can be obtained by reading the manual of the generator.

How much oil does the generator take?

The oil capacity of the engine of the generator depends mainly on the size of the generator. The amount of oil utilized by a generator varies depending upon the type of generator.

For an average Generac engine, the oil needs to be changed after every 200 hours or 2 years. Also, the capacity of the engine oil usually ranges from 1.1 to 1.9. Again, it all depends on the size of the generator.

How to estimate the oil level of a Generator?

To know about the oil range of any generator, you must read the user manual of your generator. The most important factor is to regularly check the oil level of your generator.

The improper working or frequent seizing of your generator is an indication that you have neglected to check the oil level.

Modern generators prevent the risk of any severe damage. They have a built-in feature of shut down when the fuel level is too low. This feature is very useful when you are living in a society. It reduces the risk of any electricity breakdown protecting your family, property, and neighbors.

Generally, you should check the oil level after every 100 hours of use. Make sure, the generator is cool before checking to avoid any serious injury.

Does the size of the generator affect oil intake?

It is the major factor that influences the amount of oil consumption by your generator. Also, the brand you are using determines the capacity of the generator.

Most of the generators take between 500 to 800 millimeters of oil. Read the user manual for all the details. Make sure your generator is on a level so that the oil level reading can be as accurate as possible.

How can you change the oil of the generator?

Changing the oil of the generator is a simple process and following the appropriate steps will make it easier to do.

Follow the steps given below to change the oil:

  • Turn on the generator and let it run for a few minutes until it warms up.
  • Disconnect the oil drain hose from its spring-loaded mounting clip and turn off the generator.
  • Disconnect the hose from the cap and allow the oil to drain into your container.
  • Replace the cap on the drain hose’s end and clip it back into place.

What steps should I follow for the maintenance of a generator?

The maintenance of your generator should be done from annually to hourly for efficient functioning for a long time.

Following are the steps you can follow for the maintenance of your generator. 

  • Check the oil frequently

This can affect the performance of your generator largely. Frequently checking the oil level and changing it when required is the main requirement.

The engines in the car are liquid-cooled while the generator’s engine is air-cooled and there are more chances of oil catching fire. Just cool down the engine before you change the oil.

  • Maintain the air filter

The air filters of the generator should be cleaned timely so that no dirt accumulates in them. Make sure to wash them gently with soap. A harsh touch may tear the filter making it useless.

  • Change the oil filter regularly

Usually, the large generators have oil filters that also need maintenance and timely replacement. Before removing, refer to the user manual to remove it in the right way.

What type of oil should I use in the generator?

The best answer to this question can be found in the user manual of your generator. The manual suggests the best type of oil for the generator along with the oil maintenance procedure.

A less viscous oil will be suitable for your generator in extremely cold conditions and in hot conditions you need more viscous oil.

A clean air filter and the right type of oil will ensure the working of your generator in any weather condition.

Related questions

Can you overfill oil in the generator?

Overfilling your generator with oil might cause early wear on the internal components of your generator’s engine, leading to significant engine damage and generator failure.

What happens if you put too much oil in your car?

It has the potential to ruin the engine. If there is too much oil in the system, the pressure on the crankshaft will rise.

Overflowing engine oil can also cause engine rods to bend and valve pipes to collapse. It can also lead to overshooting of the spark plug. Excess oil can contaminate spark plugs, prompting their replacement.

Why is my generator consuming too much oil?

Worn valve guides, generally the exhaust guides, or worn piston rings, are the most frequent cause of engine oil consumption.

Allow the engine to idle for several minutes. Inordinate valve guide attrition is the most likely cause if a large billow of bluish smoke is exhaled, then fades and the exhaust remains relatively clean.


Even though they’re built by the same company, the amount of oil required for each generator varies dramatically. This is why we have been suggesting you review your owner’s handbook before attempting to fill it up.

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