2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 16Get this manual
MAINTENANCE Maintenance quick reference
III# Item Lube RecPolaris PS-4 PLUS Performance Synthetic 2W-50 4-Cycle Oil Method Frequency Change after 1st month or first 20 hours of operation, 100 hours thereafter; Change more often (25 hours) in severe duty conditions or short trip cold weather operation Check level daily, change coolant every years Check level every 25 hours; change lubricant yearly Check level every 25 hours; change fluid yearly Check level during pre-ride inspection; change fluid every years
Engine Oil
Add oil to proper level on dipstick
Engine Coolant (400 H.O Transmission Front Gearcase Brake Fluid