At exactly 30km average speed Im at 15.1 liters per 100.

Yep, concur with all the above. Had my mostly stock BA for years and has always ranged from 12-low 20s depending on speed/acceleration/traffic. I drive my car to enjoy it also and average around 16-17 in total.

The computer reading is far from perfect but gives a decent estimate.

thx mate, that sounds fait enough.

I think I migh just convert it to LPG.....

that's no fun

your using it around the town/city the readings would be right.

but if you want to keep it go LPI.