I heard that most biodiesel is made from the leftover vegetable oil used in restaurants. Doesn't sound like corn to me.
These oils account for a significant fraction of world-wide edible oil production.
All are also used as fuel oils.
Coconut oil, a cooking oil, high in saturated fat, particularly used in baking and cosmetics.[3]
Corn oil, a common cooking oil with little odor or taste.[4]
Cottonseed oil, used in manufacturing potato chips and other snack foods. Very low in trans fats.[5]
Canola oil (a variety of rapeseed oil), one of the most widely used cooking oils, from a (trademarked) cultivar of rapeseed.[6]
Olive oil, used in cooking, cosmetics, soaps, and as a fuel for traditional oil lamps.[7]
Palm oil, the most widely produced tropical oil. Also used to make biofuel.[8]
Peanut oil (Ground nut oil), a clear oil used for dressing salads and, due to its high smoke point, especially used for frying.[9]
Safflower oil, produced for export for over 50 years, first for use in paint industry, now mostly as a cooking oil.[10]
Sesame oil, cold pressed as light cooking oil, hot pressed for a darker and stronger flavor.[11]
Soybean oil, produced as a byproduct of processing soy meal.[12]
Sunflower oil, a common cooking oil, also used to make biodiesel.[13]