You guys worry about FC too much.
It's hard to calculate FC, because it depends on the road conditions.
I remember when I tested I pumped till the fuel dispenser gun clicked, I travelled 40+km, pumped again till the gun clicked, RM4.XX (this was when fuel prices were RM1.92/l) LOL.....
2litre per 40km!! (WOW.. oh wait, I also conveniently forgot to mention I was driving downhill from Grik.)
Can see how that relates to some ridiculous FC claims by manufacturers and by owners of small cars?
currently, I don't think anyone can get sub -15 sen/km anymore. unless they drive 50kmh at 5th gear on highways with sub-2000 rpm.