The oil change time of commercial fryers depends on a number of factors, including the type of fried food, the frequency of use, and the quality monitoring of the oil. ‌ ‌

The main influencing factors of replacement time
1.‌ Types of fried food ‌ :
‌Fried light food ‌ : such as French fries, potato chips, vegetable tempura, etc., produce less impurities, the oil can be used for about 2-3 days, but need to be filtered after the close of business every day.
‌Fried meat and heavy flavor food ‌ : such as fried chicken, fried ribs, etc., due to the release of more protein, fat and seasoning residue, the oil deteriorates quickly, may need to be changed every day, or use for a maximum of 2 days.

2‌.‌ Frequency of use ‌ :
High frequency ‌ : such as fast food restaurants, food street stalls, etc., the oil may need to be replaced within 1-2 days, because frequent heating and frying will accelerate the oxidation and deterioration of the oil.
‌low frequency use ‌ : if some restaurants only use when specific dishes are needed, the oil can be used for 3-5 days; If the fried meat and other heavy flavor food, can be used for 2-3 days, but also need to be filtered after each use.

3.‌ oil quality monitoring ‌ :
‌color change ‌ : when the color of the oil changes from light yellow to dark yellow or even brown, it indicates that the oil has oxidized and carbonized, and should be replaced.
‌odor change ‌ : If the oil begins to emit a pungent odor, such as burnt, sour, etc., it should also be replaced immediately.

Recommended replacement frequency
‌ideally ‌, when using vegetable oil to fry food, the life of the oil is usually about 10-15 days, but frequent use will shorten its life.
‌in actual use ‌, the oil replacement frequency should be determined according to the actual situation. In general, the oil needs to be changed every 1-2 months. If the color of the oil turns dark or there is an odor, it should be replaced immediately.