so i went to the dealer to have my 5,000 oil change etc and asked them about increasing the tire pressure to 42f/40b for better gas mileage. they said i would go through tires 3x's as fast. what are your thoughts on that (for people that have experimented with this thus far?) i have read on how to better the gas mileage and i believe i am doing everything except i haven't changed my (air pressure) tires yet. i live in las vegas, i have a 2005 package 6, the temp is fairly warm - currently 60's, i haven't been running the ac, my commute to work is short =6m/rt, i have been keeping an eye on my tire pressure pump and glide/etc. my last tank i ave 39.6. i want to make it better. the toyota- fixit guy said, "yeah, prius aren't all that." i was pissed. i love my prius. your thoughts on the tire pressure are greatly appreciated!!!