What is flex fuel cars
2 Answers
Cars that can use diverse fuels to propell vehicles. Not much in the way of savings as the flex fuel gets poor fuel economy and performance.
BoholMark is right, Flex-Fuel cars can run on gas or up to 85% ethanol alcohol. But not to be confused with cars or usually trucks, that have separate tanks and can run on CNG (Compressed Natural Gas) and/or Propane