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.
It also burns hotter, so it has a higher octane rating. A flex engine must be built to handle those technical challenges. For starters, your car has to know what kind of fuel you're pumping. An onboard computer analyzes fuel composition to optimize engine ignition, adhere to emissions standards and regulate combustion.