318iS Consumption

[satty]

Hi,

recently bought a 1990/G reg 318iS, and am finding it quite juicy.
On a full tank (£47), it just about manged 230 miles!
Is this normal, because compared to my previous H-reg model, its quite bad. It has the 16" alpina's on it, this can't be the cause can it?

Also could there be a problem with the engine fuelling?

Cheers all