for example in the uk, there are 5 types of fuel grades that are available at the forecourt which are e10/95ron (unleaded), e5/97ron (super unleaded), e5/99ron (super unleaded), b7 (diesel), b7 (super diesel). it would be a good option to allow the user to select thier preferred fuel grade / type as for myself i prefer using 99 octane (e5) so if i have that option selected it will only show those forecourts instead of some that only offer 97.