I'm looking at a 2015 F-150. It doesn't say on the webpage that the truck is on if it's flex fuel or not. So I checked the pics, there isn't a flex fuel sticker on the tailgate. I thought all new vehicles are flex fuel. Am I wrong on that? I do have the trucks vin # if that would help.

 

I don't believe the turbo v6's are flex fuel, only the 5.0 and 3.5 na. Correct me if that is wrong.

 

It is a turbo V6. It will still burn that 10% ethanol stuff though won't it?

 

I think if your filler neck (or cap in other vehicles) would be yellow if it's flex fuel. I know my 5.0 is yellow and flex

 

Here's my 3.5eb. Im sure its the same for a '15eb

 

Ya think that's it

 

My 3.5 na filler cap is yellow, I too thought just the na engines were ffv but I've been known to be wrong before lol

 

I have a 2012 that is flex fuel, it has the yellow filler cap. What I really need to know is if it's not flex fuel, will it still run on the 10% ethanol gas? I've never run my 2012 on ethanol because there isn't anywhere around here to get the E-85 stuff. Not that I would run it on E-85 even if there was.

 

Yes you can. If you notice on that black cap e0-e15. Flex fuel means the vehicle can burn higher ethanol concentrations like e85. 10 percent ethanol fuel is extremely common and can be burned in most engines.

 

Isn't most gas watered down with 10% ethanol these days