Actual MPG at different speeds (scanguage owners) - GreenHybrid

Tim K · #1 (**permalink**) 08-16-2006, 07:06 PM

I was wondering if any of our scanguage owners might be able to post some numbers. I'd love to know what the approximate MPG is at certain speeds and what the "ideal speed" is for driving these vehicles (25mph, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75). I know it depends on conditions, but it should be easy enough to find a level 1/2 mile stretch somewhere to run at a constant speed. I don't have a scanguage or the instant MPG readout....all I've got is that little bar graph on the Nav system and that thing is all over the place.

I did an extended drive today on fairly flat rural NJ roads (on rt 38 and 72 across the pines) that was mostly at 50-55mph. I think I must have gotten about 38mpg on this route but maybe my math is wrong.

I started at 174 miles with an avg of 28.2 MPG (trip ODO and FE display on Nav system). I finished at 329 miles with an avg of 32.3 MPG. By my thinking that means I used 6.17 gallons to go the first 174 miles and a total of 10.18 gallons to go 329 miles. That means I used 4 gallons to go the 155 miles I drove today which equals 38.75 MPG.....unless I am wrong somewhere.

gpsman1 · #2 (**permalink**) 08-16-2006, 09:35 PM

Here's some data from a 2wd FEH.
I have 44 psi in all tires, and roof-rack cross bars removed.
Also, 0W-20 Mobil 1 oil.

The "best" is easy to remember.

48 MPG at 48 miles per hour.

42 MPG at 55 miles per hour
40 MPG at 60 miles per hour
37 MPG at 65 miles per hour
33 MPG at 70 miles per hour
29 MPG at 75 miles per hour
26 MPG at 80 miles per hour

The best is city, where I use "Pulse & Glide" and "Low Gear Advantage.
In the city, even with A/C use, I get 44-48 MPG at 30-40 miles per hour.

Without A/C in city driving, I can get 54 MPG without much effort.
68 MPG is possible if I pull out all the stops and really try hard.

GaryG · #3 (**permalink**) 08-17-2006, 02:14 AM

Hi Tim

Wayne Gerdes ask me to conduct a Steady State speed test for his presentation at Hybridfest last month. The Test were put in the article I wrote on "Hypermiling The Ford Escape Hybrid" at http://www.cleanmpg.com/forums/showthread.php?t=350 at CleanMPG.com. The intent was to show the difference between cruise control and without at 30,40,50 and 60mph. I conducted the test on a flat road with the battery full and no A/C about 6 times for each speed. My SG was reset at that speed for one mile each time. At the end of one mile, I recorded my average according to the SG. Hope this helps.

GaryG

Tim K · #4 (**permalink**) 08-17-2006, 06:07 AM

Good info. I guess it is entirely possible that I was averaging over 38mpg. With the AWD Mariner and 40psi in the tires I would expect a slight reduction in FE.