Warnning: MPG gauge meter is inaccurate for all prius

Old news. The sky is not falling.
The same "defect" exists in almost all cars equipped with an onboard computer that tries to track gas mileage.
It was the same with my Malibu and my current Elantra.
The Malibu seemed to have the biggest over-shoot and my C the least, based on limited experience.

You may not like it but getting upset about it accomplishes nothing useful.......as it is not likely to change.

 

You are entitled to your opinion but the fact IS that the mechanism/electronics used just isn't that accurate.

You have done your civic duty by posting it here and bringing it to our attention .......again.

If you wish to argue about it more, I suggest that you contact a lawyer and file a court action.

Done.

 

Considering all the variables; fuel pressure, flow rate, variable injector timing and the fact that the system was (as I understand) intended to monitor emissions compliance in a fairly coarse way rather than estimate mpg I'm actually pretty impressed that its as good as it is, and seems to have gotten more accurate over time/generations.

 

There was a case about Honda Civic Hybrid a while back all over the news, don't remember who won.

 

so far my prissy has met or exceeded the epa estimate, so I don't really care if the meter is accurate or not

 

Our 2010 regular prius consistantly overestimates fuel economy by an average 8%. The range is maybe 6 to 9 %. My 2 cents: that's not due to vagaries of the electronics, it's a deliberate ploy by Toyota, to cheer up owners and spread bogus mpg claims.

Considering they've got the mpg game cornered, maybe they should stop with this nonsense?

 

Buger flipping is fun, even Obama does it:

 

Calculated for the 106k miles I owned my 2005 Prius the dash mpg was 2.68% optimistic. That's close enough in my book.

 

That happens in our world.

this the samething on most car Ads regardless of brands, such as: We achieve 30MPG (or 40MPG Highways) more on our top rated selections.

well, My first "ugly" Hyundai Accent 1996 (sold years back) can achieve 32 MPG mixed local & Highways.
I just blindly compare ads for Mazda 3 or Yariz or other comparable cars.

I would bow-down when they can achieve 50MPG-60MPG on gas/petrol cars.

cheers..

 

I don't really care what the display shows, I calculate te MPG te old fashioned way.

I'd say most Prius owners will do the same tbh

 

i can't believe this, i feel so dirty...

 

Mine's pretty darn close. I also hand calculate every time and I have had several that matched the meter to the tenth. Sometimes it's over a little, sometimes it's under a little. So factor all that in, I'd say it's pretty good.

 

so lets get this right, I'm in a automobile with a fuel tank, a petrol engine, and a odometer, and even though there maybe some fluctuations due too, fuel evaporation/expansion/contraction/quality, air temperature/ humidity/quality, tyre pressure, wear, road surfaces, engine wear, variable wind resistance, different engine/vehicle loads, constant changing condition of engine and fuel system, (air and fuel filters, spark plugs, injectors, state of inlet and exhaust components etc), fuel being a liquid, therefore sloshing around in the tank causing inconsistent fuel gauge readings, a CVT transmission (without a constant direct drive to the wheels) the reported MPG on the in car display may be incorrect ?
they are taking a liberty, I tell you what you design a system that can give an accurate reading for all these variables andi will make you a Zillionare

 

Oh, and your new precise reporting system has to be as cheap as the current one. Good luck with that.

There is an obvious solution for Toyota: Remove the offending displays. Ford had a good, simple solution. Measure the fuel level by lifting the passenger seat and inserting the stick.

 

Says who? What law or federal regulation governs the accuracy of MPG displays? I am aware of none.

This isn't like the speedometer, where some jurisdictions forbid the OEM display from reading lower (but not higher) than actual speed. Nor is it like the odometer, where some class action tort lawyers made a bundle over fraud claims regarding displays that read over (but not under) actual miles, causing some customers to be wrongfully denied some warranty claims.

That concerned actual MPG compared to the EPA MPG label. Both of those are different subjects than this thread.