Flex Fuel??
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Joined: Oct 2004
Posts: 18
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From: Oklahoma
Flex Fuel??
I have a 2004 F-150 with a V-8. I checked my owners manual and it does not say anything about being able to burn etahnol. What would happen if I was to fill my tank with fuel mixed with ethanol?
Senior Member
Joined: Jul 2004
Posts: 6,200
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From: Easton, Pa.
At the fuel fill it should have some indication (FFV).
The motor will have obvious different equipment than a strait gas motor.
E85 will run lean in a strait gas motor and should bring on a CEL lamp after several drive cycles.
The motor will have obvious different equipment than a strait gas motor.
E85 will run lean in a strait gas motor and should bring on a CEL lamp after several drive cycles.
Senior Member
Joined: Dec 2006
Posts: 43,530
Likes: 817
From: Joplin MO
It is not safe running any more than about 40% ethanol in a straight gas engine except in an emergency, much more than that will be out of range for mixture control. Also, the more ethanol, the harder it is on fuel system components.