Always try to keep up with regular checks and so on. So the other day I checked my timing and what do you know its set at 20o BTDC instead of 15o BTDC (2000 X).

So I set it at 15o BTDC and a week or so later I've lost almost 30 miles out of my gas tank :p

Same route, same driving style, same gas station, same load........

A good note is I had an occasional ping when running with the A/C on not anymore.

So I guess if you cant get 300 miles to a tank advance your ignition a couple of degrees what do you think??