I getting a new red fit 1.3 from PI. the basic model, Pi gave upgrade to 15'' Rims/tyres and i requested a Mugen body kit. Help me decide,

1.Shall i upgrade more to 16'' rims and tyres, thinking about getting adventi rims, preferably light ones ? Should i jump to 16'' ?? Bigger rims means more fuel being drunk, how like this ? 15 or 16

2.Shall i install the Mugen bdy kit ? i know it takes up some weight. i prefer bdykit with 16'' rims, but afraid of the FC(fuel consumption). bdykit with 15'' rims is another alternative, not too sure if i just simply upgrade the rims to 16'' without any bodykit.

Help me guys, so that i can make a better decision.

 

Is the mugen body kit an upgrade from the dealer in PI? I'd go with the 15 and put the mugen body kit I'm sure it's not that big of a weight added to the car with the body kit.