Pseudoscience describes any belief system or methodology which tries to gain legitimacy by wearing the trappings of science, but fails to abide by the rigorous methodology and standards of evidence that are the marks of true science.
1 Flex-fuel hybrid electric and flex-fuel plug-in hybrid are two types of hybrid vehicles built with a combustion engine capable of running on gasoline, E-85, or E-100 to help drive the wheels in conjunction with the electric engine or to recharge the battery pack that powers the electric engine.
Some flex fuel versions of engines are optional at extra cost, but it's the same charge as for the conventional gas version of the same engine. The Ford F-150 pickup is an example. Its base price is $18,220, but that's with a 202-horsepower 4.2-liter V6 engine, which runs only on conventional gasoline.