166 Fuel Economy

Hi,

My 166 2.5 V6 (1999) averages around 19.5 mpg, if I take it really
gently on a motorway I can get his up to 23mpg. Is this normal
/usuall? I read on a recent posting of someone who was getting 28mpg
which is bit more respectable. If this is a problem, any ideas on the
solution as the local alfa dealer is hopeless.

Also any suggestions on tyres, I've just had to replace all four after
9 months / 9000 miles. Wear was pretty even across them all. Again is
this normal.

Thanks

Jon
jong at theoffice dot net