Spanish omelette wheat tortilla of Mexico and neighbouring countries, which is a thin flatbread. In most of Hispanic America, where both the flatbread and potato omelette are eaten, the omelette is called "tortilla española" to distinguish it from the maize tortilla of the region. Because the potato is called "papa" in much of Hispanic America (instead of the term "patata" used in Spain), this dish can sometimes be referred to as "tortilla de papas" in that region as well. The Spanish tortilla ("tortilla de patatas" in Spain) is widely eaten in Spain and some Spanish-speaking countries. While there are numerous regional variations,
Vegetable oil fuel Vegetable oil fuel Vegetable oil can be used as an alternative fuel in diesel engines and in heating oil burners. When vegetable oil is used directly as a fuel, in either modified or unmodified equipment, it is referred to as straight vegetable oil (SVO) or pure plant oil (PPO). Conventional diesel engines can be modified to help ensure that the viscosity of the vegetable oil is low enough to allow proper atomization of the fuel. This prevents incomplete combustion, which would damage the engine by causing a build-up of carbon. Straight vegetable oil can also be blended with conventional diesel