Regarding the venturi kit, do you really lose 1km/l once you convert to LPG? Like from 6km/l on petrol to 5km/l on LPG? Can it be possibly tuned to maintain its old efficiency?

What size of tank is good for a 2.2 car?

Where is the best place to put the filler nozzle? in the fuel tank lid or below the trunk? any pros and cons?

Also, do all LPG gas stations accept credit cards to fuel up?