Cold Weather Operation
If the ATV is used year-round, check the oil level frequently. A rising oil level could indicate the accumulation of contaminates such as water or excess fuel in the bottom of the crankcase. Water in the bottom of the crankcase can lead to engine damage and must be drained.
If the oil level rises to the top of the sight glass, change the oil immediately. Always operate the engine long enough to reach operating temperature, which reduces condensation.