Tank Capacity

[dmi]

I have worked out that when the crusing distance gets down to zero and the indicator hits 'R' there is usually at least 8 litres left in the tank and I can go a good 40 miles before needing to refuel.

I always refuel right to the top, until I literally cannot get any more in and the most I have put in the rx300 is 71.89 litres after getting 421 miles out of the tank. Just wondered though what the real, as opposed to stated, capacity of the tank is? Perhaps it is the same?

On my old Mondeo, the stated capacity was 58 litres but I once put 70.5 litres in.

[Lexusjohn]

dmi, I myself do as you do "brim" the tank each time to get an accurate MPG figure. There is however ( if you wait a min or so) an expansion area on top of the tank, this sould not be filled unless you are going to emmediately drive 10 miles or more.

So it can apear that the tank is larger than specified, and can mislead into thinking the car has done more or less to the gallon.

I use this method, I fill the tank slowly using the trigger half pulled in, on the first click I note the fuel used, there after i dont count but fill all the same.

Next time I do the same and at the first click I note the fuel used and calculate from there. Complicated mabe but thats me,