# Increase in gas mileage? **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [June 12, 2010, 5:06pm UTC](https://community.cartalk.com/t/increase-in-gas-mileage/50227 "2010-06-12T17:06:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Marathon](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@Marathon](https://community.cartalk.com/u/Marathon)\ **Post date:** [June 12, 2010, 5:06pm UTC](https://community.cartalk.com/t/increase-in-gas-mileage/50227/1 "2010-06-12T17:06:32Z")
Did the caller get new tires? ---
**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\ **Post date:** [June 12, 2010, 10:07pm UTC](https://community.cartalk.com/t/increase-in-gas-mileage/50227/2 "2010-06-12T22:07:35Z")
The Brothers don’t reply here, at least they don’t under their real names. ---
**Author:** ![Stealthy](https://avatars.discourse-cdn.com/v4/letter/s/7ea924/32.png) [@Stealthy](https://community.cartalk.com/u/Stealthy)\ **Post date:** [June 13, 2010, 3:08pm UTC](https://community.cartalk.com/t/increase-in-gas-mileage/50227/3 "2010-06-13T15:08:21Z")
I had a similar experience with my 2002 Subaru Impreza with 180,000km. As I drove west from Indiana, my mileage (typically the Transport Canada rated 8.5litres/100km) got steadily better, until in Utah, it peaked at about 4.7 litres/100km, better than a Toyota Echo! (BTW, a LOWER number is better…less gas for 100km, about 60 miles) I checked my tire pressure and it seemed as though the improved mileage was related to the drop in atmospheric pressure as I climbed over the Rockies. By the time I got to Eugene Oregon my tire pressure went from 40 PSI back down to 32, an my mileage was back to normal. I shoulda stayed in Utah!