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.
Flexible fuel vehicles (FFVs) are vehicles that can run on fuel blends containing up to 85 percent ethanol, E85. According to the Energy Information Administration, there were more than 8 million FFVs on the road in 2010. That figure may rise as the demand for fuel-efficient vehicles grows.