If motor oil is the lifeblood of your car, fryer oil is the lifeblood of your fryer. Fryers must have oil to operate and that’s why oil must be managed to increase the longevity of your fryer. Oil degradation often occurs from essentially three things: hydrolysis, oxidation, and polymerization. Hydrolysis is caused by moisture getting into your oil and the effect is the breakdown of your oil and poor coloring. Oxidation is the cause of air or oxygen accelerated by light, trace metals. This causes harmful compounds such as peroxides, volatile compounds/ toxins like aldhydes, ketones, alcholos, hydrocarbons, etc. Polymerization results in solid build-up, greasy food, bad tasting food, and foaming and smoking of the oil. Polymerization of your oil happens when other triglycerides and improper oil keeps from flowing evenly.