anyone getting better MPG in the gen3 then there gen2?

One way of handling the improved 2010 Prius is to begin using higher speeds and get the same fuel consumption. That is why measuring mph vs MPG is so important. For example, my wife and I took a trip to Nashville, 122 miles, and she drove it with her typical 'lead foot.'

I didn't mind because the MPG was a tolerable 48 MPG. We got there in time for her appointment and that was the goal of the trip, not the vehicle mileage. Sure, if she'd been ready to leave earlier, we could have taken a little longer and easily gotten over the 52 MPG I got on the return trip. But the important part of the trip ... her appointment in Nashville ... was accomplished.

A few random data points from the Garmin:

• 75 mph - average speed (posted 70-75)
• 93 mph - peak speed
• A/C on the way up

Had she driven the same profile with our 2003 Prius, we would have seen less than 39 MPG instead of 48 MPG.

Bob Wilson

 

I'm not one to gamble, so I won't be offering much of a wager here. Still, I wonder at your posting. What makes you think winter numbers would be the same? Also, how can you say the "it seems pretty clear by now" that summer numbers are similar? We've only barely cleard one-third of the summer, and the only comparisons are with NEW 2010s.

You can see my Gen3 numbers compared to the Gen2 in my signature.

Here's the best I can do for now: The first two months I owned my Gen2 were mid-August to Mid-October. I averaged 53.0MPG.

The first two months I owned my Gen3 were late-May to middling-July (OK, I haven't yet had the car two months!). I've averaged 56.7MPG.

If I really am doing 3-4MPG below other Gen3 cars because I have the PriusV w/AT and 17" wheels, then my new FE "would have been" 59.7 to 60.7 or 60.2 as an average. Compared to my Gen2, the 60.2 is a 7.2MPG improvement in similar circumstances (new and summer-y). This is an increase of nearly 14%. Taking my actual numbers is impressive enough with an increase of 3.7MPG or 7%.

 

I remember lots of people guffawing at the GM Malibu hybrid, myself included. What was the pittance of an increase over the baseline car -- about 5% ?

Don't take my post as a personal insult, or too seriously. I think the G3 is a fantastic car. I do however suspect that the advances present in the G3 over the G2 can be for the most part made up by a G2 driver willing to suffer the minor inconvenience of a radiator grill block, and in some cases use of an EBH.

To the extent that I am critical, it is not directed at the G3 per se, but at our consuming public who require high tech EGR to solve what a bit of foam and a few minutes of time would do about as well. I personally would have valued much more tech advances that pushed ICE efficiency to 40% from it's current 36%, instead of EGR and ICE improvement to 37%. R&D to add yet another layer of ignorance and laziness just rubs me the wrong way.

[/rant]

 

I have noticed improved gas mileage with my GenIII. I think it might also have to do with the hybrid indicator screen helping to keep your foot lighter on the pedals.

 

I'm on my first tank 1/2 way in and am at 5.2l/100km which is about 56mpg accourding to my trip meter we'll see how close it is when I fill up. I'm hoping to get it below 5l/100km prior to 2nd fill up!

 

i posted stats for all my fillups thus far post #169 and the only time the MFD was lower was the first fillup which probably has to do with the dealer filling it further than i normally do since i pretty much stop right after the first click.

http://priuschat.com/forums/gen-iii...my/62323-2010-mpg-stats-post-them-here-9.html

although the 2010 MFD is reading an average 3½ mpg higher than pump calculations, its still an overall 5 mpg higher than the 2006 (on paper its more but she does not get the mileage i get)

 

yes- without any effort! it seems to go into glide more readily and sustain it better.

 

I took the EPA user reported mileage and plotted them in buckets:

FIRST: We have too few samples of EPA, ZVW30 data, which leads to the curious artifact, the double humped distribution. I have not yet tried to see if there is some correlation of City/Highway percentages to the higher mileage drivers. Folks are welcome to see if they can find a pattern in this limited data. After all, we're looking at unit car counts because the ZVW30 sample set is so small.

Regardless, the initial data suggests the ZVW30 will have an overall higher mileage than the NHW20. With another month or two of EPA user data and I suspect we'll see enough samples to compare the two. Note, these are distributions of mileage averages and are not weighted by individual driver miles.

Bob Wilson

 

Bob,

Thanks for starting this chart.

One observation: Unfortunately, there is no way to screen the EPA data to determine which ones are using MID (computer or indicated MPGs) and which ones are using Fuel Purchases (actual or calculated) data. There is an indication of City (stop and go) vs. Highway for each individual, but I think many people are using very rough estimates.

(My data is from fuel purchases -- I'm No. 24 -- and I track my city v. hwy miles for each fill-up. BOY, do they ever take a long time to get the shared data uploaded and ready to "share"!)

 

Later tonight, I'd like to add the 'poll' data that we have showing a more normal distribution. It has nearly 3x as many samples as the EPA data so it meets the requirement. Also, the EPA data was last updated 8/11 so the next major update may bring in a large enough sample set to lose the 'double hump.' That really could be just an artifact of too small of a sample (how many times have we all gone down that rat hole!)

In another thread, I suggested an approach to checking the calibration of the indicated mileage. But it may take at least a month before I'll have any solid data to share.

About the double hump, each bucket is 5 MPG wide. To get a double-hump from a systemic error in the indicated mileage, we would need to see an error larger than a single bucket. This would imply +5 MPG or at least 10% or higher ... or lower. Alternatively, one set of Prius with a 'half bucket' low and the others with a 'half bucket high' BUT these are just some idle numerology mutterings ... (need more beer to appreciate!)

Bob Wilson