Soybean or canola deep fryer oils are preferred. Top quality oil increases the life of the air filter and reduces taste transfer, providing your customers with superior tasting products that will help you build customer loyalty and referral traffic.
An average of once a week, more often during heavy use. Please see the Owners Manual for detailed suggestions.
You can, but it's not necessary.
Once every 3 months is recommended, provided top quality oils and frozen products are used; more frequently when lesser quality oils and frozen products have been used. Heavy use may require more frequent replacement.