EcoModder Forum Post your commute MPG with elevation change.

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Coroplast Engineer

Join Date: Nov 2011
Location: suburban Chicago
Posts: 80

AV - '04 Chevy Aveo sedan - not LS
90 day: 34.28 mpg (US)

Jolteon - '00 Honda Insight MT
Team Honda
90 day: 77.25 mpg (US)
Thanks: 27
Thanked 25 Times in 11 Posts
I think it makes more sense when you look at speed.
If I drove 30 mph for the first half of a 30 mile trip, and 15 mph for the second half, my average speed is NOT (30+15)/2= 22.5 mph.
Instead, it took half an hour for the first half and an hour for the second half, so you're average speed is actually:
(30 miles)/(1.5 hours)= 20 mph.

The key is in the denominator you cannot add 30 mph to 15 mph, because even though the miles driven is consistent, the time taken is not. You have to find the least common denominator to add them together.

However,
If I drove 30 mph for 2 hours and 15 mph for another 2 hours.
(30 mph+15 mph)/2= 22.5 mph does work because the denominators (time) are the same.

You can check that:
(60 miles driven + 30 miles driven)/4 total hours= 22.5 mph, which is the same.

So yes it would make sense to switch to (fuel used/mile) since our commute distances generally stay the same. A one mile road tends to not change in size from day to day. What a strange world that would be.

__________________
Quote:
 Originally Posted by Tango Charlie You know how when you buy a car, and then you start noticing how many others there are on the road? Yeah, that doesn't happen with a 1st gen Insight.

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Coroplast Engineer

Join Date: Nov 2011
Location: suburban Chicago
Posts: 80

AV - '04 Chevy Aveo sedan - not LS
90 day: 34.28 mpg (US)

Jolteon - '00 Honda Insight MT
Team Honda
90 day: 77.25 mpg (US)
Thanks: 27
Thanked 25 Times in 11 Posts

Yeah. The idea is to use as little fuel as possible up the hill, because that is where your losing the vast majority of your fuel economy. That is just one of the advantages of having a hybrid.
__________________
Quote:
 Originally Posted by Tango Charlie You know how when you buy a car, and then you start noticing how many others there are on the road? Yeah, that doesn't happen with a 1st gen Insight.

 11-05-2012, 03:38 AM #23 (permalink) Master EcoModder   Join Date: Jan 2012 Location: MI, USA Posts: 454 92 Camry - '92 Toyota Camry LE Team Toyota 90 day: 26.81 mpg (US) 97 Corolla - '97 Toyota Corolla DX Team Toyota 90 day: 30.1 mpg (US) Red F250 - '95 Ford F250 XLT 90 day: 20.34 mpg (US) Thanks: 8 Thanked 51 Times in 30 Posts Amazing site! I foresee a tool to calculate the best MPG routes with this info + speed limits (user entered), stop signs etc. Orignal Route to work.. I always get a tiny bit better on the trip to work, I can see why now... I'm going down hill the last 40% of the trip ^.^, need to cut that dang hill out of the middle... lets see the 2nd route I found lately.. Yea.... MUCH better looking.. too bad it is right though town.... I need to learn how they pull that info from google maps so I can figure in where stopsigns, traffic lights, etc are at. Must.... find.... better.... route.... EDIT: I'm a computer nut... you should download the images instead of linking direct to the site, I can view the routes etc with a small url edit. Attached Thumbnails     __________________ F250 Build Thread Corolla Aero mods - Retired (for now) How to setup an Ecomodder MPG Image in your sig My ATV tech info site - https://atvmanual.com/?s=em Last edited by ps2fixer; 11-05-2012 at 03:47 AM..
 11-06-2012, 06:25 PM #24 (permalink) n00b     Join Date: Aug 2011 Location: Dawsonville Posts: 39 stimpsF150 - '01 Ford F-150 Supercrew 90 day: 16.5 mpg (US) shifty - '12 Mazda 3 i-touring 90 day: 38.02 mpg (US) Thanks: 0 Thanked 4 Times in 3 Posts And no real alternate routes. 15 red lights in 20 miles, 25 possible stops including stop signs. __________________
 11-06-2012, 08:37 PM #25 (permalink) .   Join Date: Dec 2011 Location: The Berkshires, Massachussetts Posts: 885 Ruby Sparks - '01 Honda Insight Team Honda 90 day: 64.27 mpg (US) Thanks: 111 Thanked 362 Times in 202 Posts only 200ft elevation between top and bottom isn't terrible. I've learned that the biggest factor is the grade, which you can view on the website. The maximum negative average grade. Hills that aren't too steep, followed by long shallow negative grade just enough to keep momentum are ideal. Everyones graph has a different scale with regard to elevation. Even if it looks terrible, they don't scale distance in miles to "look" equal in regard to feet of elevation. __________________ I try to be helpful. I'm not an expert.
 11-06-2012, 10:12 PM #26 (permalink) Master EcoModder     Join Date: Feb 2012 Location: Ontario, Canada Posts: 596 VX - '94 Honda Civic VX Team Honda 90 day: 47.95 mpg (US) Thanks: 133 Thanked 89 Times in 66 Posts Here is mine, if it will work. This is my main commute, I also have a much shorter, 9 mile trip to school. Which makes up usually a little more than half my tank, and this is my other half of the tank. Distance: 54.1 mi Elevation Change: +1902 / -2517 ft Max Grade: 4.6% Hmmm.. I can't get the imagine to show up __________________ Last edited by 2000neon; 11-06-2012 at 10:21 PM..
 12-02-2012, 09:37 PM #27 (permalink) Doesn't do, "normal"   Join Date: Nov 2012 Location: Austin Tx Posts: 49 Project UpCycle - '01 Honda Rebel Streamliner Build Team Streamliner Homers Hybrid - '08 Toyota Highlander Hybrid moms car - '97 honda accord lx 90 day: 34.93 mpg (US) Adventure - '98 Mazda Protege 90 day: 33.11 mpg (US) The Silver Civic - '02 Honda Civic 90 day: 36.15 mpg (US) Thanks: 2 Thanked 3 Times in 3 Posts ~6 miles to work with about equal hilling in both directions. Attached Thumbnails   __________________ Honda Rebel Streamlining Project
 03-02-2013, 10:52 PM #28 (permalink) EcoModding Lurker     Join Date: Mar 2011 Location: Moon, PA Posts: 16 2012 Honda CR-Z - '12 Honda CR-Z EX 90 day: 45.25 mpg (US) Thanks: 3 Thanked 4 Times in 4 Posts To Work: To Home: To Home (Alt): I have an alternate home route because the regular one is about 3.5 miles shorter, but it involves a much steeper gradient and in bad weather conditions (ice and snow) it just isn't safe to drive.