Question about Tefal FR8040 Oleoclean Pro Oil Fryer / Deep Fryer

It is important to use only highly heatable oils. Keywords such as "high oleic" sunflower oil help. Or refined rapeseed oil. If it smokes, you have the wrong oil/fat, dispose of it! -> acrylamide.

Otherwise: in Belgium (stronghold of French fries) beef kidney fat is used.