[J.T.H2]

Hi all!
What a wealth of information here!! I just tuned my '04 H2 with the Hypertech Power Progammer. I definitely feel the difference in the power and shifting. My question is, how do I know if my mpg is improving (currently 10.5 mpg). Will this hopefully change on my next 1 or 2 gas fill ups? How does it factor the avg? I'd would appreciate any recommendations on programmer settings (don't have on hand the settings I used). Thanks!!!