[ribeye2065]

I just upgraded from a 2015 SEL to a 2013.5 SHO (pics up soon).

The gas cap says "no E20-E85" and there are no flex fuel markings on the car.

What would I need to replace on the car to get it to be able to run E85 without breaking anything? (other than my wallet?)

 

[Jeff K]

You very likely cant. You would need the "fuel sensor" from a flex fuel Ford spliced into the fuel line that measures the % EtOH in the fuel via its dielectric constant and find a way to interface it with the SHO PCM, which would likely be very difficult to impossible to do. The DI fuel injectors may not be compatible with E85.

E85 is worthless anyway. Yes it is cheaper per gallon, but E85 has less energy content that straight gasoline or E10 resulting in a significant drop in fuel economy which makes it more expensive per mile to use E85 than E10 or straight gasoline. Combustion chamber design is somewhat different on flex fuel engines than E10 / straight gasoline engines also.

 

[brn]

You very likely cant. You would need the "fuel sensor" from a flex fuel Ford spliced into the fuel line that measures the % EtOH in the fuel via its dielectric constant and find a way to interface it with the SHO PCM, which would likely be very difficult to impossible to do. The DI fuel injectors may not be compatible with E85.

E85 is worthless anyway. Yes it is cheaper per gallon, but E85 has less energy content that straight gasoline or E10 resulting in a significant drop in fuel economy which makes it more expensive per mile to use E85 than E10 or straight gasoline. Combustion chamber design is somewhat different on flex fuel engines than E10 / straight gasoline engines also.

Unless you're running an Indy car. E85-E100 is great if the engine is actually designed for it.

 

[Jeff K]

^^^^ Agreed