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how much oil does a generac 10kw take

How much oil does a Generac 10kW generator require?


Generac is a well-known manufacturer of standby generators, and their 10kW models are popular options for homeowners seeking reliable backup power. If you own or plan to purchase a Generac 10kW generator, one important aspect to consider is the amount of oil it requires for proper operation and maintenance.

Why oil is important for a generator?

Before delving into the specific oil requirements for a Generac 10kW generator, let’s briefly understand why oil is crucial for all generators. Oil plays multiple essential roles in the functioning of a generator, including lubricating all the moving parts, reducing friction and wear, cooling the engine, and preventing corrosion. Regular oil changes are essential to ensure the generator’s optimal performance and longevity.

Oil capacity of a Generac 10kW generator

The oil capacity of a Generac 10kW generator depends on the specific model, but most of these generators typically require approximately 1.9 liters or 2 quarts of oil. It’s important to note that this is the total oil capacity and not the amount of oil needed for a single oil change. Additionally, it is always recommended to refer to the generator’s manual or contact Generac customer support for precise oil capacity information based on your generator’s model number.

Oil type and viscosity

In addition to knowing the oil capacity, it is equally important to use the correct oil type and viscosity for your Generac 10kW generator. Generac recommends using their own brand of oil, specifically formulated for their generators. This ensures that the oil meets the required standards and provides optimal protection. The recommended oil viscosity for most Generac 10kW generators is SAE 10W-30, which is suitable for a wide range of operating temperatures.

Frequency of oil changes

Regular oil changes are crucial for maintaining the performance and longevity of your Generac 10kW generator. Generac recommends changing the oil in their generators every 100 hours of operation or annually, whichever comes first. However, it’s important to note that severe operating conditions such as extreme temperatures or dusty environments may require more frequent oil changes. Always refer to the generator’s manual for the manufacturer’s specific recommendations.

Checking and filling the oil

To ensure the proper functioning of your Generac 10kW generator, it’s important to check the oil level regularly. Generac generators are equipped with an oil level sensor that provides an indication when the oil level is low. When adding or changing oil, make sure the generator is turned off and cool. Use a funnel to pour the oil slowly into the oil fill tube, allowing time for the oil to settle before checking the level.


Knowing the correct oil capacity, type, and viscosity for your Generac 10kW generator is essential for its optimal performance and longevity. Regularly checking and changing the oil as per the manufacturer’s recommendations will ensure that your generator is always ready to provide reliable backup power. Remember to consult the generator’s manual or contact Generac customer support for precise oil capacity information specific to your generator model.

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