See also:

Winter Operation4
When operating the system during the winter months, make sure the air intake, located directly in front of the windshield, is free of ice, slush, snow, or other obstructions. ...

Fluid Capacities
...

Engine Air Cleaner Filter
Refer to the “Maintenance Schedule” for the proper maintenance intervals. WARNING! The air induction system (air cleaner, hoses, etc) can provide a measure of protection in the case of engi ...