Abstract: A fryer includes a fryer pot, a filter pan connected to the fryer pot by a drain conduit and a return conduit forming a filtration loop, a cooking oil quality sensor being in the filtration loop, and a controller that controls operation of a filtration cycle of the fryer. The filtration cycle has a circulation sequence and a fill sequence. The circulation sequence circulates cooking oil through the filtration loop and the fill sequence fills the fryer pot with the cooking oil from the filter pan. The controller stops the fill sequence after filling the fryer pot with a predetermined amount of cooking oil during a partial fill and resumes the fill sequence after a predetermined amount time elapses to complete the fill sequence. The cooking oil quality sensor measures a cooking oil quality to obtain a cooking oil quality measurement during the predetermined amount time.

Abstract: A fryer system and method of extending oil life in fryer pots by minimizing the effects of oxygenization, hydrolysis and lack of oil replenishment during the cook cycle. The fryer system includes a controller that controls an on time and an off time of the fryer pots according to a use schedule. The use schedule levels or equalizes the on time use among all of the fryer pots. The controller includes a processor that executes instructions stored in a memory to control the on time use and off time use of the fryer pots as well as the use of filtration based on an elapse of a predetermined number of cook cycles of a stopped fryer pot since the oil was last filtered.