2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 103Get this manual
CHECKING THE ENGINE OIL LEVEL
CHECKING THE ENGINE OIL LEVEL 1.Place the machine on level surface2.Remove: Engine side panel Refer to "SEAT, CARRIERS, FENDERS AND FUEL TANK"3.Check: Engine oil level Oil level should be between the maximum and minimum marksOil level low Add oil to the proper levelNOTE: Do not screw the dipstick in when checking the oil levelRecommended oil: Follow the left chartNOTE: Recommended oil classification: API Service "SE", "SF" type or equivalent (e.g"SFSECC", "SFSESD" etc