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.
GM identifies its E85 ethanol flex-fuel vehicles with Flex Fuel E85 badges and yellow fuel-filler caps. Ford labels its E85 ethanol flex-fuel models with a tree-and-road logo and a decal reading FFV, for Flexible Fuel Vehicle. The Chryslers, Dodges, and Jeeps display a silver Flex Fuel E85 tag. E85 ethanol flex-fuel vehicles from Mercedes-Benz and Nissan do not carry any special identification.