Because certain subsidies and incentives allow many
for less money than regular gasoline, the fuel is becoming a popular choice among motorists, even if their vehicles are not certified for flex-fuel use. All vehicles sold in the U.S. today are capable of accepting small doses of the alcohol fuel, as up to ten-percent of normal gasoline may be ethanol. Of course, the fuel is available in higher concentrations for vehicles which have been designed to use it, with E85 - eighty-five-percent ethanol, fifteen-percent gasoline - proving one of the most popular combinations.
Apparently, though, the lower price of the fuel has attracted the attention of those looking to save a few bucks on each fill-up. In fact,
indicates that many users are mixing their own blends right in their tanks. This trend has prompted some gas stations to allow a choice of ethanol mixtures for drivers who want to use it, right from a single pump. Manufacturers warn that using alcohol fuels in vehicles not certified for them could cause permanent damage, so be sure you know what you're doing before breaking those rules.
AP via The Detroit News