Yay, I was looking for this thread.
I get from our lander, approx 760km (approx 472 miles), from a full tank of diesel. (Lander is approx 15 years old original engine pre TD model). Mainly a mix of A class road driving and city driving, where stop start - traffic lights kills the fuel consumption (epecially if the wife is driving - un necessary gas pedal action and holding the gears too long before changing).
When motorway driving I try to keep the RPM at apppox 3K, anymore is like dropping a sponge in the fuel tank - besides that £300 a time in speeding fines don't help.
Having run it on veg oil and diesel on and off over the past year, it's time to go in for a service as the fuel filters and pipes may need to be addressed.
But, looking at the consumpions in this thread, I don't feel as bad as I did earlier.
However now the temp gauge has now died - alway's summat to do...