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Best Times of Year for Generating Oil Change Maintenance?

April 5, 2026

Quick Answer

The best times to generate an oil change maintenance schedule for a generator are after every 100 to 150 hours of operation, typically during spring and fall when usage is higher, and before switching to a different oil type.

Seasonal Maintenance

When it comes to generator oil change maintenance, seasonal usage plays a crucial role in determining the best timing. In areas with harsh winters, it’s essential to change the oil before the generator is put away for the season. This helps prevent water condensation and corrosion during storage. For example, if a generator is used for 100 hours during the winter, it’s recommended to change the oil after the last use before storing it.

Oil Change Interval

The American Society for Testing and Materials (ASTM) recommends changing generator oil after every 100 to 150 hours of operation. However, this interval may vary depending on the generator’s manufacturer specifications and operating conditions. It’s crucial to consult the owner’s manual for specific guidance. Some generators may require oil changes after as little as 50 hours, while others may go up to 200 hours.

Storage and Maintenance Tips

When storing a generator, it’s essential to change the oil and store it in a dry, well-ventilated area to prevent water condensation. Additionally, consider storing the generator with a full tank of fuel to prevent condensation in the fuel system. Before starting the generator after storage, inspect the oil and air filter for signs of contamination or damage. Replace them if necessary to ensure optimal performance and longevity.

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