I recalculated it just to be sure I didnt mess up with the conversion. I did use this guys converter which I believe is correct:
http://www.joshmadison.com/software/
10L @ 100km = 23.5mpg
13L @ 100km = 18mpg
Not sure how you are converting it but one of us is off.. Guess I'll have to do some converting with old school formula to be sure this program is accurate.
Either way I dont think the gas mileage posted is too bad. Im getting a little under 20mpg with my Tacoma with the 3.4 v6. It could do a little better if I kept my foot off it :-) A friend of mine has a Ford with the v10 in it.. that puppy gets 8mpg if hes lucky. Goobs of towing power.. too bad its a Ford, not that I want that kind of gas mileage. Hopefully my mileage will improve with a cap.