20 KW Generator Maintenance Kit, Only For Models Produced Before May 2013, 999 CC Engine, Maintenance Recommended At Every 200 Hours Or 2 Years, If Running In A Dusty Environment, More Frequent Maintenance May Be Required, Maintenance Intervals May Differ Per Model, Refer To The Generator Owner's Manual For More Information, Kit Includes, Air Filter, Oil Filter, Spark Plugs, Oil Funnel, Chamois & A Reminder Sticker, Recommended Oil: Synthetic 5W-30 For Temperatures Between -20 & 1,100 Degrees Fahrenheit, 10W-30 For Temperatures Between -10 & 40 Degrees Fahrenheit, SAE 30 For Temperatures Between 32 & 110 Degrees Fahrenheit, Oil Not Included.