what does the letter "F" mean in the 8th place from the right in a vehicle's VIN #?

[farmboy_ryan]

what does the letter "F" mean in the 8th place from the right in a vehicle's VIN #?

example:
xxxxxxxFxxxxxxxxx

 

[moeh]

depends on the vehicle

 

[CyberdyneIndustries]

Its the engine code number.