Buick V6 fuel economy

[justbad4you]

wow id hate to know what i have spent in fuel in the last 29yrs always has at least 1 v8 wow id hate to know/

I recently did a 3100 km trip from Perth to Coral Bay. Fuel consumption calculated after each fill-up was 8.23 L/100 km, 9.7 (a bit of short running during a week at Kalbarri), 8.49, 8.6, 8.48, 8.51 and 8.86. Since being home it has been 10.45 and 12.14. In my previous car, a VR Lexcen which I owned since new, I had a complete fuel record:
Distance travelled: 203935 km
Fuel used: 21,054 litres
Fuel cost: $18,296.79
Average fuel consumption: 10.32 l/100 km