The best cooking oils to use in a home deep fryer are the cooking oils, Olive Oil, vegetable oil, canola oil, sunflower oil, peanut oil, and rice bran oil.
When deep frying most foods I use Canola Oil but I also sometimes will use peanut oil such as when cooking chicken, fish or other meats.
But when cooking fries or potatoes I prefer to use canola oil which makes the fries and potatoes taste better although the peanut oil will cook the potatoes and fries just fine as well.
I just prefer to use canola oil for the potatoes or fries and use peanut oil for deep frying the fish, chicken and other meats that I deep fry.