i believe it... had my vx in the city the other day.. and anyone whos ever driven in philly traffic knows.. sometimes you gotta hit the go pedal HARD and i was driving the crap outta the ol' girl.. 5000+ rpms etc... once i got away from the city to check my gas mileage (scangauge) i was astonished to find i was at 16.5mpg.. a little higher than when i REALLY baby the throttle... since then started revving hard and fast then letting it coast the rest of the way.. seems to help my mileage