how do i know if its flex fuel or just plain gas?


RumpRanger98

15+ Year Member

Joined
Feb 19, 2009
Messages
292
Points
3,101
City
Tacoma, WA
Vehicle Year
1999
Transmission
Manual
wonder how to check what my truck is, they ask me flex fuel or regular when i got spark plugs...
 
mine is flex fuel and it is marked on the filler door, i believe under the hood on the white sticker and my truck has a little black badge with a white leaf on it placed on the tailgate by the ford symbol.
 
mine is flex fuel and it is marked on the filler door, i believe under the hood on the white sticker and my truck has a little black badge with a white leaf on it placed on the tailgate by the ford symbol.

While mine did not have the symbol on the tailgate my fuel tank also said "Flex Fuel" or something to the like on it.
 
I think one of the letters in the VIN will be a V, while non flex fuel is, I think, a P.
 
close. if the 8th digit of the VIN is:

V - its a flex fuel

U - its not
 
I believe my gas cap has flex fuel with a red arrow through it
 

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