Honda and Acura Car Forums banner
1 - 20 of 21 Posts

·
Registered
Joined
·
9,883 Posts
Discussion Starter · #1 ·
Well-known motorists club AAA says many cars and trucks it road-tests fall far short of their government fuel-economy ratings.

Using that disappointing fuel economy data from hundreds of road tests in what AAA calls real-world driving, the organization plans to endorse legislation to be introduced Thursday that would require the U.S. Environmental Protection Agency to overhaul its gas-mileage tests.

Environmental groups have argued for years that mileage labels are bogus, but it is significant that AAA is throwing its influence behind the bill to change them.

"There's no doubt that it helps. And it highlights the fact that it's just common sense — providing consumers with accurate information," said David Friedman, a research director for the Union of Concerned Scientists. UCS strongly backs legislation to require realistic mileage ratings.

AAA data come from tests done by drivers across the country "getting groceries, getting stuck in traffic jams, driving the same way you would," said AAA spokesman Mantill Williams.

The organization concedes that its tests aren't scientific but insists the results are representative.

Among vehicles that were farthest off EPA ratings: the 2004 BMW Z4 sports car, which AAA says hit just 14.5 miles per gallon in combined city-highway use, versus a 24 mpg EPA rating; the Chevrolet TrailBlazer SUV, 13.6 mpg in AAA testing versus 17 mpg EPA rating; and the Chrysler PT Cruiser, 17.5 mpg from AAA versus 25 mpg EPA rating.

Fuel-economy numbers posted on new vehicles are generated by 30-year-old EPA tests in which vehicles are run without air conditioning, never exceed 60 mph, never accelerate hard enough to hit 60 mph from a standstill in less than 18 seconds and always go far enough to fully warm up the engine. EPA uses correction factors to try to get closer to actual mileage.

Most highway driving now is faster than 60. Even slow family cars will accelerate to 60 in less than 12 seconds, and many trips are too short to warm the engine.

The so-called Fuel-efficiency Truth-in-Advertising act would require EPA tests to "reflect modern driving patterns and experiences, specifically speed and highway-versus-urban driving," says Rep. Nancy Johnson, R-Conn., co-sponsor of the bill with Rush Holt, D-N.J. "Those are no-brainers," she said.

EPA itself is mulling changes. It is considering how to account for factors that "will lower fuel economy," including, "air conditioning, aggressive driving (e.g. high speeds and quick accelerations), cold weather, traffic congestion and others."

In a statement, EPA promises to "propose appropriate changes this year."

http://www.cars.com/go/news/Story.j...nt&story=030305storyaUT&referer=&aff=national
 

·
Registered
Joined
·
5,438 Posts
UnseenShadow said:
hehe its not the automakers misleading us... its teh EPA's testing :hehe

well, if you DRIVE like they do on those stupid ass tests and granny shift, you get the gas mileage that they claim, or so i have found. however, most of us with performance or performace-modded cars do not drive that way... why put in the money if we dont see a return on our investment, right???
 

·
Registered
Joined
·
3,178 Posts
hobie237 said:
well, if you DRIVE like they do on those stupid ass tests and granny shift, you get the gas mileage that they claim, or so i have found. however, most of us with performance or performace-modded cars do not drive that way... why put in the money if we dont see a return on our investment, right???
So what you're trying to say is that power brakes in a parking lot doesn't help my average MPG :evil
 

·
Registered
Joined
·
8,144 Posts
flyingtoaster said:
I wonder if the Corvette really gets 20/29.
All the domesticheads who drive them get all defensive and say they do... but who knows if it's really true or not? I bet if you put it into that ridiculously long 6th gear and just putter down the freeway you could... but in normal driving? I doubt it.

With my car modified moderately I still hit the 25/31 mileage the EPA claims for it. It actually depends more on the weather than on the type of driving I do with mine. I'll get 21mpg just taking short trips in cold weather but I've seen over 34mpg on hot summer days with fast, hard highway driving and even an autocross race on the tank. The things LOVES warm weather and doesn't seem to care if I drive it hard.
 

·
Registered
Joined
·
1,297 Posts
I get about 23 mpg with mostly highway driving (80%) and some stop n go too. My lude is rated at 21/26, so thats not too bad. What sucks gas is vtec though, when I drive hard I can get as low as 16 mpg.
 

·
Registered
Joined
·
12,534 Posts
White98LS said:
All the domesticheads who drive them get all defensive and say they do... but who knows if it's really true or not? I bet if you put it into that ridiculously long 6th gear and just putter down the freeway you could... but in normal driving? I doubt it.

With my car modified moderately I still hit the 25/31 mileage the EPA claims for it. It actually depends more on the weather than on the type of driving I do with mine. I'll get 21mpg just taking short trips in cold weather but I've seen over 34mpg on hot summer days with fast, hard highway driving and even an autocross race on the tank. The things LOVES warm weather and doesn't seem to care if I drive it hard.
yeah mine is the same way in the warm weather i get 32MPG compared to the 28 im suppose to get in teh Cirrus :D
 

·
Registered
Joined
·
1,297 Posts
I just figured my mpg out for my last tank of gas...it was suprisingly good. 24.8 mpg (~25) and thats mostly commuting time. But thats not too bad considering that EPA rates the lude at 26 highway.
 

·
Registered
Joined
·
5,405 Posts
White98LS said:
All the domesticheads who drive them get all defensive and say they do... but who knows if it's really true or not? I bet if you put it into that ridiculously long 6th gear and just putter down the freeway you could... but in normal driving? I doubt it.
Why not in everyday driving? My z28 was an auto so i can't use that as a comparison, but my old 94 5.0L GT was a 5spd and i could shift that thing @ 2,000rpms in city driving because it had the proper tq to pull at those rpms. All that low end tq is what made the 1st to 4th gear skip-shift feature on the corvette's possible when running such low rpms. So it can be done in city mode too assuming you're careful with your right foot and the proper gear is selected.
 

·
Registered
Joined
·
5,438 Posts
esp4p3 said:
What sucks gas is vtec though, when I drive hard I can get as low as 16 mpg.

as i said, they dont drive realistically in the mpg tests... no hard acceleration and they also do it with nothing in the car, so your mileage is only going to go down from where it is in the tests...
 

·
Registered
Joined
·
5,160 Posts
interesting after i mod my car my old accord EX AT get more MPG than the EPA rating
 

·
Registered
Joined
·
1,297 Posts
dodolaje said:
interesting after i mod my car my old accord EX AT get more MPG than the EPA rating

Did you add a cold air intake? That improves your mpg.
 

·
Registered
Joined
·
8,144 Posts
hobie237 said:
99% of gas mileage is HOW YOU DRIVE
Not true in my experience. Like I said, my best mpg I've ever gotten - 34.2mpg - included hauling ass up a mountain pass and an autocross race, also which included a lot of warming up the car w/o moving at the race... which is 0mpg "driving." Besides coasting back down the mountain, the rest of the tank was on the highway at 80-90mph - not the most efficient speed by any means. For some reason my car really doesn't seem to notice or care how I drive it, but it really likes warm weather.

I do notice that how I drive in turbo cars matters a lot. Staying in the boost a lot = horrible mileage.
 

·
Registered
Joined
·
5,160 Posts
esp4p3 said:
Did you add a cold air intake? That improves your mpg.
hey i did... how did u know. dang...u r good..its an old 1991 accord with 2.2 SOHC engine i mod the cold air intake, DC header greddy exhaust and BBS rims what a nice and simple mod. the weird part is i got that 30mpg hwy compare to the 28mpg on the EPA rating when i drive it with a full load of stuff in my car.<-- i was moving from texas to new york. i drove far and hard.
 
1 - 20 of 21 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top