How Often Should You Change Oil In A Generator. Run the generator for a few minutes to warm it up before you drain the oil. Large diesel generators may require oil changes only every 500 hours.

Equipment owners should clean the filter after 50 hours of use or every 3 months whichever comes first. If your generator stops working its a good idea to check the oil first. When refueling top off the oil.
Firstly you need to warm up the old oil inside the engine a little bit to make it drain out more easily.
You should use SAE 30 oil most maintenance kits come with two quarts. If applicable change your oil filter when you change your generators oil. For smaller gas generators this may be as often as every 50 hours. Answer 1 of 6.

