*dindop, today I made a big sacrifice. Drove my FXT on the skyway from Makati to Alabang and stayed at 100kph, just to see what the FC would be by being a law-abiding citizen. Oh the humiliation of being overtaken by an Innova, Starex and Altis.
Conditions: 11:30 am on a Sunday, aircon at auto, 20C setting, outside temp at 32C, Shell V-Power fuel.
Upon exiting at Alabang, the trip meter showed 10.6L/100km or 9.4km/L. Curiosity satisfied. I'm guessing FC would be better at ground level because it's got less ups and downs than the skyway. But then again, who wants to drive at 100kph?