Perhaps this is why they go so many miles? lol

http://articles.moneycentral.msn.com...sOdometer.aspx

 

Also, if you're calculating fuel mileage by hand (or the computer) it could be 1-2mpg higher than what it really is...

 

This would effect someone's real world calculated mileage. It would make it appear that the mileage driven on the tank of gas was greater then it actually was. Just some food for thought.

 

It could affect it on their trip computer / DIC as well, if the computer algorithm is using the same data for distance as the odometer.

Cheating bastards.

I remember when a friend of mine had done some joint OBD work with Honda. He was not impressed with the way they tried to cut corners and skirt the regs. For all the faults GM has, their emissions and diagnostic guys tried damn hard to meet the regs. I saw it myself, as I used to work in the diagnostics development group at the General.

I remember Car and Driver doing a check of vehicle speedos, noting that the GM cars were among the most accurate (within 1% of their GPS and/or radar checks). I think BMW was one of the worst, and I'm thinking Honda may have been as well (but I'm not sure about that one).

WTF.

 

On the page it says other manufacturers as well, I wonder if any domestic brands are on that list. Although I'm sure if they were there they wouldn't have wasted time listing Honda.

 

LOL!!!
You so funny! (and truedat)

 

Interesting that they would put another article about this being so late.

http://www.usatoday.com/money/autos/...ter-usat_x.htm

This information is about 1.5 years old.

Big problem was that there is a voluntary standard on this set by SAE. It is set to -4%/+4%. Honda was centering around +2%. Your mileage would look high, your mpg would be higher (.5 to 1 mpg at most), and you would be out of warranty slightly faster as well.


They said Toyota was just slightly under on it mileage reported, and the Detroit cars were nearly perfect.

Again, why is this article 1.5 years late to the party.

 

I've noticed my wifes speedometer is off by about 5 mph (it says she's going 70 when she is actually going 65) at 70mph. She probably has the same thing going on.
She has a 99 Honda Accord

 

Speedometer being off does not necessarily mean the Odometer is off. That could just be a gauge calibration.
My '95 Accord was about 2% optimistic, but my '02 TL-S and '06 TL are basically dead-on. I used a handheld GPS, though, not mile markers.

 

GTO speedos are known to be a few mph off, and it's intentional as they are all off by the exact same amount AND i'm talking even the digital speedo reads high. Like i can be driving down the highway with my scan tool running and see 70mph on the scanner and 67mph on the dash. The odometer stills rolls true though.

There's a guy who can program the guage cluster to enable the factory shift light and a few other things, one of the things he can do if you ask is program the speedo back to 0 error.

 

I think it would be funny to see someone file a lawsuit against a manufacturer for gettin a speeding ticket because the speedometer was off

 

I thought it used the speedometer to calculate mileage?

 

No. Most modern transmissions use a magnetic hall effect-type sensor that puts a pulse output on the VSS output wire. You get x# of pulses per mile (For instance, my T56 in the '80 is cal'd at about 48000). The odometer portion counts the pulses to add up the mileage.
The speedometer gauge simply deflects the meter "this far" for a given speed. Many manufacturers (I think the Germans are the worst) make the needle sweep a little high to give people a buffer when "speeding." The odometer, however, is generally accurate.

Moving away from stock tire sizes messes this all up, of course.

 

Ive noticed that about any import with non-electronic trans reads high. Interesting that they still are now though!

Didnt Honda get in trouble before with its minivans?

 

You funny.