I doff my cap to you Jocko - you get fantastic figures.
I try not to waste petrol. It is a game with me. When I bring the car out of the garage in the morning, the moment the front wheels are on the down ramp I switch off the ignition. When I start away I allow no warm up. I put the car in 1st, turn the key, and as soon as the engine fires the clutch is up and I am off. I seldom come to a complete stop in traffic, trying to keep the wheels rolling however slightly/slowly (you know how hard it is to push a stationary car but much easier once you get it moving). I switch the ignition off every time I get stopped at a set of traffic lights that I know will be red for a while (I drive the same routes day in and day out). I hang back as I approach every red light, hoping it will change in my favour, and treat every green light as if it will turn red as I reach it. It is pointless to accelerate to a green light as that is fuel you have wasted if it changes (or like so many other drivers, you continue on through the amber!). Before I pull away from parked I wait until the traffic clears so I just start and go. In a supermarket car park I drive into a bay where I can drive in and out in a forwards direction, even if it means a longer walk (supermarket trolley doesn't use petrol!). All these little tricks, used every time I drive, adds up to petrol saved and good mpg figures. Remember, most of my miles driven are in town and in traffic and the rest is on busy main roads.