"Tony Hwang" wrote in message
news:Nt6tj.40274$Ly.30911@pd7urf1no...

Hi,
EPA figure is based on sea level wht IDEAL driving condition, weather,
road, wind, temp., etc.

Considering that the EPA's National Vehicle and Fuel Emissions Laboratory is
located in Ann Arbor, Michigan, and that Ann Arbor is about 840 feet above
sea level, and that the EPA conducts its own tests at this facility, I think
your claim that the mileage figures are based on sea level conditions is
suspect.

Considering that starting in 2008 supplementary tests are conducted to
estimate the effects of high speed (up to 80 mph), use of air conditioning,
and cold temperatures (down to 20 degrees F), the claim that current figures
represent ideal conditions also seem somewhat out of sync with the facts.