Car rental, decoded
Full to full
Also known as: FTF
A fuel policy where you collect the car with a full tank and return it full, paying only for the fuel actually used at normal prices.
What you may think
I'll be charged for a full tank up front.
What is actually happening
With full-to-full you pay only for the fuel you use; you return it full rather than prepaying a tank.
Nifti note
For travelers: many find full-to-full the easiest policy to judge, because you generally pay only for the fuel you use.