Generac 11 KW Home Standby Generator Maintenance Kit. Designed for units manufactured in 2013 or later. Maintenance is recommended every 200 hours or 2 years, or more frequently if operating in a dusty environment. Maintenance intervals may vary per model, so refer to your generator's owner's manual for specific instructions. The kit includes an air filter, oil filter, spark plugs, oil funnel, chamois, and a reminder sticker. For optimal performance, use synthetic 5W-30 oil for temperatures between -20 & 1,100 degrees Fahrenheit, 10W-30 oil for temperatures between -10 & 40 degrees Fahrenheit, or SAE 30 oil for temperatures between 32 & 110 degrees Fahrenheit. Oil is not included in the kit.