Go Back   EcoModder Forum > EcoModding > Success Stories
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-26-2010, 09:55 PM   #1 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
SGII first observations!

...OK, I performed an initial GALLONS "offset" calibration; and here are some 'semi-scientific' results (26.2 miles each way):

DAY #1 -- 32.0 mpg at 37-deg.F going TO work at 6:00am.
DAY #1 -- 38.2 mpg at 60-deg.F coming FROM work at 5:30pm.
DAY #1 -- 35.1 mpg avg.

DAY #2 -- 32.3 mpg at 42-deg.F going TO work at 6:00am.
DAY #2 -- 38.8 mpg at 67-deg.F coming FROM workat 5:30pm.
DAY #2 -- 35.6 mpg avg.

DAY #3 -- 33.5 mpg at 49-deg.F going TO work at 6:00am.
DAY #3 -- 38.3 mpg at 63-deg.F coming FROM work at 5:30pm.
DAY #3 -- 35.9 mpg avg.

DAY #4 -- 34.4 mpg at 48-deg.F going TO work at 6:00am (drizzling).
DAY #4 -- 36.1 mpg at 52-deg.F coming FROM work at 5:30pm.
DAY #4 -- 35.3 mpg avg.

DAY #5 -- 33.3 mpg at 45-deg.F going TO work at 6:00am.
DAY #5 -- 40.0 mpg at 68-deg.F coming FROM work at 5:30pm.
DAY #5 -- 36.7 mpg avg.

DAY #6 -- 35.1 mpg at 46-deg.F going TO work at 6:00am.
DAY #6 -- 39.3 mpg at 71-deg.F coming FROM work at 5:30pm.
DAY #6 -- 37.2 mpg avg.

DAY #7 -- 36.4 mpg at 53-deg.F going TO work at 6:00am.
DAY #7 -- 40.7 mpg at 55-deg.F coming FROM work at 5:30pm.
DAY #7 -- 38.6 mpg avg (!).

DAY #8 -- 33.7 mpg at 45-deg.F going TO work at 6:00am.
DAY #8 -- 37.2 mpg at 66-deg.F coming FROM work at 5:30pm.
DAY #8 -- 35.5 mpg avg.

DAY #9 -- 34.1 mpg at 45-deg.F going TO work at 6:00am.
DAY #9 -- 38.5 mpg at 66-deg.F coming FROM work at 5:30pm.
DAY #9 -- 36.3 mpg avg.

DAY #10 -- 34.6 mpg at 43-deg.F going TO work at 6:00am.
DAY #10 -- 40.7 mpg at 73-deg.F coming FROM work at 5:30pm.
DAY #10 -- 37.7 mpg avg.

...which produces the linear regression analysis (for this car):

MPG = 0.23*(temp) + 24, with RR = 0.82

...finally, the tank MPG is the average of the individual trip MPG's, ie:

MPG(tank) = [ MPG(trip.1) + MPG(trip.2) + ... + MPG(trip.N) ] / N

...and, the average of the 10 averages was 36.4 mpg while the actual tank-fill value was 35.6 mpg, which is 98%--that's just a 2% error...close enough!


addendum: SGII indicated 9.7 gallons used while the tank-fill was 9.736 gallons!


Last edited by gone-ot; 02-15-2010 at 09:54 PM.. Reason: addendum added
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-27-2010, 08:12 AM   #2 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,753

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,339
Thanked 751 Times in 477 Posts
Wasted money on a ScanGauge...
Just kidding
__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell


[Old] Piwoslaw's Peugeot 307sw modding thread
  Reply With Quote
Old 01-27-2010, 03:47 PM   #3 (permalink)
EcoModding Apprentice
 
janvos39's Avatar
 
Join Date: Jan 2009
Location: Belgium
Posts: 159

jvsgears - '14 Skoda Octavia
Team m8
90 day: 52.47 mpg (US)
Thanks: 22
Thanked 38 Times in 28 Posts
Piwoslaw Lucky for you. I have not been able yet to find instrumentation for my Ford Focus Diesel - maybe I must change Ford for a better known brand LOL.
__________________
  Reply With Quote
Old 01-27-2010, 04:33 PM   #4 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,753

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,339
Thanked 751 Times in 477 Posts
Quote:
Originally Posted by janvos39 View Post
Piwoslaw Lucky for you. I have not been able yet to find instrumentation for my Ford Focus Diesel - maybe I must change Ford for a better known brand LOL.
I think you misunderstood me. I was saying that Old Tele Man wasted money on a SGII which didn't show him anything new. Of course, it was a joke

I'm still ScanGauge-less, but my Peugeot does have a factory installed fuel consumption gauge. It's usually off 0.5-1l/100km, but it'll have to do until I get my hands on the SGII. If only they were cheaper outside of North America...
__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell


[Old] Piwoslaw's Peugeot 307sw modding thread
  Reply With Quote
Old 02-01-2010, 05:52 PM   #5 (permalink)
Getting BETTER Mileage
 
Jethro's Avatar
 
Join Date: Dec 2009
Location: Los Alamos, NM
Posts: 108

Lucky No 19 - '11 Ram 1500 Express ST

Venti - '13 Ram 2500 Tradesman
Thanks: 6
Thanked 18 Times in 8 Posts
I would really like to purchase one for my Nissan. However, I'm going to spend the $200 on satellite radio first. Living in the mountains means no radio (well, clear channels anyways)
__________________
- Greg
  Reply With Quote
Old 02-02-2010, 05:47 AM   #6 (permalink)
The PRC.
 
Join Date: Oct 2009
Location: Elsewhere.
Posts: 5,304
Thanks: 285
Thanked 536 Times in 384 Posts
Thats a pretty detailed log. I've kept a mental one of my built in MPG readings and on the way out its usually 45 and back is usually 55. Average is just under 50 (see success stories) so it seems reasonably close.

Piwoslaw - how did you determine the scale of the error on your built in meter ?
__________________
[I]So long and thanks for all the fish.[/I]
  Reply With Quote
Old 02-02-2010, 06:25 AM   #7 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,753

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,339
Thanked 751 Times in 477 Posts
Quote:
Originally Posted by Arragonis View Post
Piwoslaw - how did you determine the scale of the error on your built in meter ?
The factory instrumentation has two resetable modes (which I reset after each trip and each fill up, resp.) and an instant consumption mode. Each trip and each fill up is noted (distance, l/100km, avg km/h, where I went, weather and/or traffic conditions if out of normal). After each fill up I do the math and compare the fuel/distance with the l/100km for that tank. Since in both cases I use the car's odometer I don't have to factor in the 5% difference between odo and GPS (that comes later). I've also noticed by doing even more math that the individual trips don't add up to the tank, but that may be b/c of the computer rounding up or down after each trip reset.

At the Peugeot forum I found out that pretty much everyone's onboard fuel computer is off by 0.5-2l/100km, some are too high, others too low. The funny thing is that the differences between the car's comp and actual fc varies with each tank. The difference may depend on the number and length of trips in each tank, but my investigations haven't gone that far.

I understand that a ScanGauge can be calibrated, so after a few tanks it should be right on? I guess that when my consumption gets even lower I'll need the SGII to refine readings, since the comp seems to be off by more when my fc is lower. And USD/EUR is still fluctuating in the wrong direction
__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell


[Old] Piwoslaw's Peugeot 307sw modding thread
  Reply With Quote
Old 02-02-2010, 09:03 AM   #8 (permalink)
The PRC.
 
Join Date: Oct 2009
Location: Elsewhere.
Posts: 5,304
Thanks: 285
Thanked 536 Times in 384 Posts
Thanks - useful info. I've looked into getting one into the UK but as you say the exchange rate is not favourable - especially not the GBP. Its also hard to justify the additional cost over the factory unit but I understand it gives more info which may be useful later.
__________________
[I]So long and thanks for all the fish.[/I]
  Reply With Quote
Old 02-02-2010, 03:56 PM   #9 (permalink)
Master EcoModder
 
Join Date: Dec 2009
Location: Leavittsburg, Ohio
Posts: 364

Mater - '98 Dodge 3500 Dually

Wilber - '99 Toyota Corolla LX

Minyatta - '93 Mazda Miata MX-5
Thanks: 102
Thanked 11 Times in 11 Posts
The Mrs. bought me a SGII for Christmas for my truck, but since my last tank gave me 47 for my VX, why drive the truck? I'm going to have to get my book out an read how to set the SGII up. It's a nice piece of equipment. Even if I take it easy, from a standing start, I'm only getting 3 MPG in my diesel. but goes up accordingly.

Glad I got one!
Dave
So many toys, too little time. At least it feels that way!
  Reply With Quote
Old 04-02-2010, 12:40 AM   #10 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2008
Location: Indiana
Posts: 131

Impala - '04 Chevrolet Impala base
90 day: 32.84 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
(stares at the mathematics at the bottom of the initial post........... smoke starts to roll from ears and eyes glaze over) ow.

Heh, nice even if I am not understanding it, ah well.

__________________
  Reply With Quote
Reply  Post New Thread




Similar Threads
Thread Thread Starter Forum Replies Last Post
SGII Trip computer question youngfg Instrumentation 6 04-02-2009 11:31 AM
SGII Not quite right dremd Instrumentation 37 09-26-2008 01:33 PM
Question: "Portability" of SGII? MechEngVT Instrumentation 8 08-27-2008 03:08 PM
What can a SGII and a little self-control do? kaveman12 Success Stories 5 08-27-2008 12:32 PM
SGII + ICE OFF = .003 cpm? Chris D. Instrumentation 6 05-09-2008 03:00 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com