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Hybrid Vehicles Toyota Prius Toyota Prius MPG-Real World Numbers
767 messages, Last post on Sep 28, 2009 at 9:21 AM
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Replying to: scottc3 (Aug 18, 2008 8:04 am) It's a well known fact that calculated individual MPG numbers can be misleading. I was always "skeptical" of posts of calculated individual tank MPGs and want to know what the previous and next tank calculated tank MPG is. This would be the case for any car, but more so for the Prius due to the fuel bladder. There is a simple way to get around it: the MFD MPG is accurate on a tank by tank basis. These are the numbers quoted in my posts. Now I know how much you doubt anything >50 MPG as indicated in a number of your posts. Those of us who track both calculated and MFD MPG have proven that the MFD MPG > than the long term calculated MPG by ~2%. As an example since Apr'07 to now my calculated total MPG is 57.6 vs. the weighted average of the MFD MPG of 58.6. The MFD MPG is > than the calculated MPG by 1.8%. I would say that is not material. However on a tank by tank basis you can have much larger differences for the reason you correctly stated. I think for some reason you're motivated to disprove anyone quoting MPG numbers > 50 as evidenced by many of your posts. You even went as far as doubting pictures of MFD MPG saying it doesn't show the first 5 minute bar ... and the first 5 minutes is always low. When I've a chance I'll post my pictures of >60 MPG tanks and pictures of some of my typical commutes (and just 4 u include the first 5 minutes). If you don't want to learn or apply how to maximize the potential of the Prius you don't need to discredit those who do and please don't turn off others from trying by saying no one consistently can and achieves >50 MPG. Gabe |
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Wow, is this fun or what? Yes, I doubt the 'normal' driver will consistently get over 50mpg. I do believe it can be done if you drive on a flat road, no going up-hill.. not passing anyone, and going the speed limit. I have seen numbers on my car that show this (>50mpg).. but let's be honest, most of us don't drive on flat roads all the time, most of us do not drive at 50mph on the freeway, and there are external factors that prevent most of us from getting >50mpg. I would like to see the 1st 5 minutes shown.. I have been told this is when the cat-converter heats up and the motor runs most of the time. Now, you may be able to shut the car off - after being run, then turn it right back on again and see a 1st 5 min graph in the 50 area.. but I know you would not do that. Honestly, I'm not out to prove anyone's numbers wrong, we all have the same car.. but road conditions vary, as to terrain we drive on / in, as do driving speeds.. so you being able to get >50mpg is great news.. bet I could too if I drove where you were. I would need to coast when you do, basically 'follow you' and I would get the same mileage. Oh, I don't think comments of 50mpg (I get 49.2 'normally') turns off anyone from getting a Prius.. this should encourage them. I do think if a new buyer reads some posts, and thinks they will get >55mpg, they will be disappointed.. and if they think they will get >60pmg.. we are misleading them. In the next 100 buyers, perhaps 1 will see 60mpg.. most will see close to 50mpg however. I hope this has cleared up any Prius Smashing that you may have felt. Scott
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I own a new 2008 Prius and I am getting 47.6 MPG after about 3 thousand miles. We do not baby the car and my wife runs AC all the time. I have been told the MPG will increase after 5000 miles. Have saved about 300 dollars in gasoline in 3 months. 
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Hey.. way to go.. I also monitor my savings.. had a Honda Van and an older (1990) BMW. I was spending $400/month.. now about $150 - and I drive a fair amount. My 2008 Prius is 8 months old, have 11,500 miles on it. I average about 49mpg.. and love it. If you have read these posts, you know others are getting >60mpg, but don't plan on this. I think you always see around 48mpg if you don't change your driving habits - like turning off the AC and really 'baby-ing it' - then you may see 50mpg, but not sure it's worth it - of course, up to you. Welcome to the Prius world.. sc |
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Replying to: rolin (Apr 27, 2008 3:48 am) |
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Replying to: scottc3 (Aug 21, 2008 4:12 pm) |
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These posts of >55mpg seem like the 80/20 rule. Well, the 90/5/5 rule to be more exact. 5% of the Prius drivers get >55mpg, some get >60mpg.. but this fall in the 5% also. 90% of the drivers will get between 48 and 52mpg, and the final 5% will get 60mpg.. hummm.. something must be wrong with our cars! You own a great little car, and it will serve you well. Be happy with it no matter where in the MPG spectrum you are. sc
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Replying to: scottc3 (Aug 26, 2008 11:22 am) Yes there are extremes of drivers getting over 60 mpg and under 40 mpg... however the histogram is very very accurate in that the middle 50% is between 45-50 .. on average ... over an entire continent's driving. The results therein reflect Canadian and Dakota type winters and Arizona summers; Rocky Mtn driving and dead flat Florida driving; NYC driving and Texas plains driving. The Median value for the entire population for all kinds of drivers over millions of miles of driving in all kinds of conditions is 47.7 mpg. That's the best guideline on average for anyone new. Special conditions may results in this unusual statement. Your Mileage May Vary |
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Replying to: kdhspyder (Aug 18, 2008 10:58 am) |
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