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Thanks to Homer findings here is some interesting info. Enjoy.


AAA Challenges the EPA on Estimated Gas Mileage Numbers
Date Posted 03-09-2005

WASHINGTON, D.C. — Insurance giant AAA says the estimated fuel economy numbers posted on new cars are phony, and has released its own set of numbers for consumers, NBC News reports.

AAA says the federal government does not test cars in real-world situations, instead conducting tests in labs at speeds under 60 miles per hour.

There are substantial differences between the numbers put out by AAA versus the EPA's ratings.

A Chrysler PT Cruiser, rated by the EPA at 21 miles per gallon in city driving and 29 miles per gallon on the highway, received an average of 17.5 miles per gallon from AAA.

The EPA says it's reevaluating its fuel economy calculation. In addition, two members of Congress have introduced legislation to change EPA testing methods.

What this means to you: We're getting closer to the truth on what kind of gas mileage our cars and trucks really get now that AAA and Congress are calling the EPA to account.
 

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Another interesting note is that the EPA doesn't actually test most of the cars it reports on. Vehicle manufacturers actually conduct those "lab tests," which consists of a vehicle on a dynometer under ideal conditions. And to my knowledge, there is nothing to enforce these EPA ratings if the manufacturer decides to report a phony number.

From my experience, the Murano should be revised to something like 17/22, instead of the 20/24 it currently gets.
 
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