as above more power less fuel I know it does not make sence

don't believe every thing you read use my car as an example

My average is 10.5L/100.

That's with a mix of highway (40%), many long (600-700Km return trip) mountain climbs/descents (40%), and some town driving (20%) over the last 10,000kms.

I cruise at the speed limits on the highway, and give it plenty on the mountain trips, around town -whatever the traffics doing/or the speed limit.

On the highways - instant consumption shows about 7.5 L/100km when the road is flat at 100Km/h, the rest of the time of course it varies hugely depending on terrain and what the right foot's doing, but averages all out at 10.5.

The exact same driving pattern was showing an average of 11.5 at about the 25,000Km mark, so it's getting a bit better efficiency now.

My car is stock BFMkII F6 with ZF Auto and with about 55'000kms on it, running 95 or 98 Octane and Valvoline Synpower 10W50 full synthetic.