Have to agree with dundertaker....it's all about the pedal, rpm's and eco light on....

i've had GL since November....mpg's were nothing close to EPA etc....but i was basing it on my estimates.....i live in ontario, canada..so weather is a factor also....and i drive little highway....

just purchased the scangauge...and in the city.....and i live in a city with light's and traffic.....toronto...it's constant stop and go..alot of pedal movement..which kills mpg's.....as i see it on the scangauge....

hwy is great.....did a jaunt to test......but adjustment on scanguage was made yet..so i can't be sure...

city....with scangauge adjusted....no heat/air on....i;m getting 21-23...albeit only a couple of days...

later...