On Feb 14, 11:16*pm, Vic Smith
wrote:
On Thu, 14 Feb 2008 20:53:12 -0500, "Lou"

wrote:

Whichever figure is right and whatever the explanation, it still seems to me
that the mileage estimates published by the EPA are too low, and it's seemed
that way ever since I started paying attention (way too many years ago).

Might be they don't account for your driving style. *Might be
something else - not interested enough to look into it, but I'm
sure they lab test versus "real world."
Think you said you had an Impala, and the 3.1 engine coupled with the
GM lockup trans is an efficient combo. *I consistently get 30-31 mpg
highway with mine ('97 Lumina) over a long stretch of varied terrain.
Measured by actual gas pumped into the tank over many thousands of
miles. *My '88 Celebrity with the 2.8 did about 28 mpg, but always had
a heavier passenger load.

--Vic

It is HEAVILY dependent on driving style. In daily commuting (DC
traffic, lots of accelerating/slowing down) I get horrible mileage but
I too was getting about 30 MPG over the holidays, driving back and
forth to visit my parents (90% highway) same drivetrain as you, '05
Impala, 3.1/auto.

nate