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Mine is a Flex fuel model. Have noticed the gas gauge start to move already. Will probably run it every 5 tank fill or so to keep the system cleaned out.
does anyone know when E-85 will become more popular?? my truck is flex fuel, and i know it will be cheaper, and with these high prices, i need it asap...btw, can you mix regular with E-85??
The main difference between flex and non-flex vehicles is the rubber parts that the fuel comes in contact with. Because of the alcohol, the rubber parts need to be made of an upgraded material.