Took my 182 as low as I dared on the fuel guage today, ran about 30 miles with the light on, filled her up and it only took 43.5 litres! Where is the other 6.5litres?! Either the guage is completely un-accurate of they are very generous with the measurement of the tank!
One of these days il take a jerry can of fuel out with me and run the car til it runs out completely, that should give the definitive answer or has anyone else done this already?