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Hi,<br><br>For a car that operates in such a
narrow (THS) envelope, there are too many (external)
variables<br>for me to pin MPG on tire pressure alone. (especially
with this 4-season climate)<br><br>I could give you my
"real world" post-hoc-ergo-propter-hoc experience of
going from 48 mpg to 53 mpg after installing 2 new
Dunlops on the rear.<br><br>But it was temperature and
terrain that affected the mpg's, not a demi tire
change.<br><br>Higher PSI should yield higher mpg's, but it also
allowed me to feel the texture of the road,
vibration-wise.<br><br>Most importantly, it stopped the excess outer tread
wear.<br><br>Handling and general ride (aside from steering wheel
vibrations) were unaffected.<br><br>Disclaimer:<br><br>For
me, the Prius has become a throw-out-the-book
car.<br><br>Because in my life before Baby:<br><br>I disliked most
Japanese cars.<br>I would never be caught dead in a car
wearing a bra.<br>I had never considered "lead-foot"
driving a MPG aid.<br>Never over-inflated tires.<br>Never
went more than 4K between oil changes.<br>Never had a
feeling that stop-and-go, slow-speed<br>driving creates
less ICE stress than steady, high-speed
highway.<br>Never thought I'd spend so much time promoting
HEV's.<br>Never thought I'd have a car with nightvision and
video.<br><br><br>NEVER say never,<br><br><br>Jeff (Prius teaching this
old dawg many new tricks)
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