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Toyota Prius MPG-Real World Numbers

767 messages,  Last post on Sep 28, 2009 at 9:21 AM

You are in the Toyota Prius Forum. Your Host is pf_flyer

What is this discussion about? Toyota Prius, Hybrid Cars, Fuel Efficiency (MPG), Sedan


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#596 of 767
40mpg ?? by scottc3
Aug 13, 2008 (12:01 pm)
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Jim / Bob,
 
If I were you, I'd start looking for something wrong with the motor / electric system.. Perhaps new plugs in the car? Not much you can do with the electric system.. but I think you should get at least 45mpg and this would be driving it hard. I question the 50+ mpg numbers, but see if you only drove 55mph, or slower, and most if it was down hill, you could bet 55 - 75mpg, but this is not an average of most users.
 
Why not call your dealer and tell them you have several friends that have Prius's and they are getting close to 50mpg... and you are getting less than 40mpg.. something is wrong.. see what they say.
 
Good luck..
 
sc
#597 of 767
Re: Thanks Bob [mfarmer1] by jimrey28
Aug 13, 2008 (1:31 pm)
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Replying to: mfarmer1 (Aug 13, 2008 11:14 am)

I think you may have the right idea! Thanks for your input!
Jim
#598 of 767
Re: 40mpg ?? [scottc3] by jimrey28
Aug 13, 2008 (1:33 pm)
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Replying to: scottc3 (Aug 13, 2008 12:01 pm)

That's good advice, I will be taking it in soon and ask them. I did ask when I first got it and they said your lucky you get that in mileage, meaning better than most cars, but I thought that was a shit answer.
 
I'll persist more this time.
Thanks!
#599 of 767
Re: 40mpg ?? [scottc3] by mfarmer1
Aug 13, 2008 (11:56 pm)
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Replying to: scottc3 (Aug 13, 2008 12:01 pm)

Well, if you have to drive 55 or slower to get the advertised mileage on these cars, then they're not worth it for at least those of us in southern California. 55 on the freeway here is akin to riding around in a buggy pulled by horses in Amish country.
I regularly drive 75-90 but have taken that down to 70 in an attempt to get good mileage (heck, I'll take the epa estimates at this point) like I see in various forums. I now have to keep over to the slow lanes as I'm getting passed by even those idiotic Smart cars. Maybe there's a bunch of extra smog crap our illustrious socialist government in Sacramento has forced upon the cars in this state that is ruining the mileage? Oh well, I have already put my deposit down on an Aptera. If that actually gets delivered to me early next year, it's sayonara Prius and good riddance! I'm not green by any means, this is purely an economic decision. I'm just trying to save money for jet-a fuel! www.aptera.com
#600 of 767
Re: 40mpg ?? [jimrey28] by Gutsy
Aug 14, 2008 (4:07 am)
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Replying to: jimrey28 (Aug 13, 2008 1:33 pm)

Jim,
 
You are driving in "D" ... correct? ... and not "B" ... which is for braking while going down steep hills. Using "B" will kill your mileage.
#601 of 767
Re: 40mpg ?? [Gutsy] by jimrey28
Aug 14, 2008 (7:27 am)
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Replying to: Gutsy (Aug 14, 2008 4:07 am)

Gutsy,
 
Always in "D" yes. I live in Chicago and it's as flat as a pancake! But thanks for the question since I have been known to do other things backwards!
Jim
#602 of 767
Re: 40mpg ?? [jimrey28] by Gutsy
Aug 14, 2008 (8:53 am)
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Replying to: jimrey28 (Aug 14, 2008 7:27 am)

Jim,
 
Darn ... thought I found the reason!
 
You may want to consider posting your mileage issue on Prius Chat
http://priuschat.com/forums/ (Select the Fuel Economy forum). They have extremely knowledgable members there who can help you pinpoint the problem so that you can achieve the mileage you deserve.
 
In my case, I'm consistantly getting in the mid 50's no matter where I drive.
 
Good luck!!!
#603 of 767
Re: 40mpg ?? [Gutsy] by jimrey28
Aug 14, 2008 (10:15 am)
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Replying to: Gutsy (Aug 14, 2008 8:53 am)

Thanks Gutsy I will!
Jim
#604 of 767
Re: Thanks Bob [mfarmer1] by kdhspyder
Aug 14, 2008 (6:56 pm)
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Replying to: mfarmer1 (Aug 13, 2008 11:14 am)

I'll have to say that it's almost impossible to drive 100 mi/day and get in the low 40's during the Spring Summer and Fall with only yourself in the vehicle and no cargo.
 
If we lived close I'm sure if we switched vehicles for a week we'd find that yours got 48 mpg on average. I've driven well over 1000 different Prius' and there has been next to no variation in performance and fuel economy given the same driving characteristics. And I DON'T drive like a grandma. I punch it at every light and get right up to speed....then I let off the pedal and coast as long as I can without disturbing traffic. Then I punch it again.
#605 of 767
Re: 40mpg ?? [mfarmer1] by kdhspyder
Aug 14, 2008 (7:06 pm)
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Replying to: mfarmer1 (Aug 13, 2008 11:56 pm)

You can't overcome the laws of physics in any vehicle. If you're generally driving at 75-90 mph your fuel economy - in any vehicle - will suffer by as much as 20-30% due to the effects of drag. That cannot be overcome.
 
It really begins to click in at 75+mph. Check the EPA website and other sources for this effect. 55 MPH on the Highway will get you into the mid-50s easily. 63 MPH will bet you around 50 mpg. 70 MPH will get you about 45 mpg.
 
Then you have to factor in wind, rain, cargo, passengers, tires and terrain. Driving 80 MPH into a strong wind may lose you as much as 30% from a nominal 50 mpg rating. That's just life. Being under 40 mpg in such a case is very very likely.
 
But then every other vehicle on the road is similarly affected. 20-24 mpg in a standard 4c Camry for instance instead of 30-32 mpg.

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