Sprinter-Forum    
 

Go Back   Sprinter-Forum > General Forums > Sprinter Talk

Sprinter Talk General discussion about anything and everything about Sprinters.
SubForums: Events Scanners


 
Thread Tools Display Modes
Old 05-20-2007, 06:43 AM   #11
mgjessop
 
mgjessop's Avatar
 
Join Date: Jan 2007
Location: San Diego
Posts: 354
Thanks: 0
Thanked 7 Times in 7 Posts
Default Re: Fuel Economy

Maybe the Dual Rear Wheels help kill some MPG... Alot of weight with those steel wheels... They must weigh close to 50lbs each...
mgjessop is offline   Reply With Quote
Old 05-20-2007, 07:34 AM   #12
Altered Sprinter
Happy Little Vegemite
 
Altered Sprinter's Avatar
 
Join Date: Nov 2006
Location: Hobart Tasmania Australia
Posts: 14,942
Thanks: 1,114
Thanked 2,360 Times in 1,866 Posts
Default Re: Fuel Economy

Place the older sprinters into perspective
three lengths three roof heights
single wheel and dual, six axle ratios.
weight class 3.5 t 4.9t
engines six of, from low powered four cylinders to high powered 5 cylinders
Transmissions three of.
millage depending on load configurations, and speed the faster you go. the less economy.
Air con takes out approx 5% of fuel economy.
Automatics on the older Sprinters use more fuel, than a manual trans
combine forward aircon and an automatic your fuel economy effectives decrease by a factor of eight percent, proven testing done a Mercedes testing grounds 2000.
Three possiable fuel economy trips urban highway and CDB
RV's another set of equations etc.
The original thread was based on a 2002 cost comparison between makes as to the sprinters lesser overall costings of repairs, seriously flawed in Analise's of using a comparisons to local makes, v a European model
With MY 313 CDi manual mid base low roof unit single wheel loaded and tested by both UTAS and the DOT using high performance oils and ULSD fuels the maximum fuel mileage on a flat highway with out wind resistance at under 65 miles per hour was 31.5 MPG.
Urban returns an average of 26 to the US gallon , and worst case coastal roads lots of rpm hill climbs. and full load ran in at 20 MPG .these figures over a two year period vary by a few miles to the gallon on three consistent roads the sprinter uses no real difference.
tire pressures are 50Lbs front and rear.
Put three identical sprinters together and see what they return on a test run , same road, time and day.
at 65 miles per hour on an urban road,they should return 24 to 26 MPG on a flat road with a 3.5 t load of toads.
Richard





__________________
I get My Rocks off! In a Mercedes Sprinter
AU..Tasmanian time AEST Hobart
There is a peaceful solution.It's called a peace Revolution.
No Shalam - No Shalom
Now lets take back the - Sprinter-Forum.


Of course I'm being totally biased.
Driving my life Away in a 313 Cdi Mercedes-Sprinter



Last edited by Altered Sprinter; 05-20-2007 at 10:12 AM.
Altered Sprinter is offline   Reply With Quote
Old 05-21-2007, 05:31 PM   #13
georgetg
2005 140" low roof
 
Join Date: Sep 2006
Location: Bakersfield, CA
Posts: 529
Thanks: 103
Thanked 126 Times in 90 Posts
Default Re: Fuel Economy

As long as you are on reasonably level terrain, the loading has little effect on mileage.

The big flat plate drag area of the sprinter (barndoor) is what drops your fuel economy as you go faster. Above 55MPH wind resistance really starts taking its toll.

Wind resistance increases at the square of speed, so if you doubled your speed you'll end up with four times the drag.

Longer sprinter,
Rear AC,
Dual Wheels
Roof Racks...

...all add DRAG which will ruin your fuel economy above 55MPH

Quote:
Originally Posted by mgjessop View Post
40mph..... 35-37mpg
45mph..... 32-33mpg
50mph..... 30-31mpg
55mph..... 27-29mpg
60mph..... 22-23mpg
65mph..... 19-21mpg
70mph..... 17-18mpg
75mph..... 14-16mpg
78mph..... 13-15mpg Top speed on GPS...
I have a low roof 140 with no rear AC
Driving at the limiter even here out west I still consistently get 22MPG.

At 55MPH get 28-29MPG
At 70MPH I get 24MPG


Cheers
George
__________________
2005 316CDI Graphite Metallic Low Roof 140" wheel base passenger van,
VW Multivan T5 floor-group and seats with aluminum tracks,
Aluminum galley with fridge microwave and sink, 2 Powersonic 75AH gel-cel, Xantrex XM1800 Inverter,
18" G-Wagen "Ashtaroth" wheels Cooper Discover H/T Plus 265/60 R18, Koni red shocks,
MaxxFan Deluxe.[SOLD June 2013] http://sprinter-source.com/forum/sho...+camper&page=6
georgetg is offline   Reply With Quote
Old 05-21-2007, 08:25 PM   #14
pvsprinter
 
Join Date: Jan 2007
Posts: 160
Thanks: 6
Thanked 39 Times in 26 Posts
Default Re: Fuel Economy

All things being equal doubling your speed requires 8 yes 8 times as much power. If you look at the chart that mgjessop supplied you'll see consumption of about 1.14 gph at 40 and 6 gph at 78. This is caused by drag and short of beating the sprinter into a raindrop shape nothing can be done to reduce its drag coefficient.
It would be nice to see a power output versus rpm table for the motor.

Are high roof versions smarter than standard roof height (bigger forehead)??

Bob
pvsprinter is offline   Reply With Quote
Old 05-21-2007, 08:29 PM   #15
sikwan
06 T1N Can
 
sikwan's Avatar
 
Join Date: Sep 2006
Location: San Jose, CA
Posts: 7,717
Thanks: 941
Thanked 1,856 Times in 849 Posts
Default Re: Fuel Economy

Quote:
Originally Posted by georgetg View Post
At 55MPH get 28-29MPG
Oh my, I have to start driving at 55mph.

Seek
sikwan is offline   Reply With Quote
Old 05-22-2007, 05:33 AM   #16
gerrym51
Idiot
 
Join Date: Nov 2006
Posts: 752
Thanks: 20
Thanked 21 Times in 20 Posts
Default Re: Fuel Economy

Quote:
Originally Posted by sikwan View Post
Oh my, I have to start driving at 55mph.

Seek
seek,

i bet you drive 75 more than 55!


gerry
__________________
GERRY

SAGE
gerrym51 is offline   Reply With Quote
Old 05-22-2007, 06:47 AM   #17
Wileycoyote
 
Join Date: Apr 2007
Location: Prince George BC Canada
Posts: 86
Thanks: 1
Thanked 4 Times in 3 Posts
Default Re: Fuel Economy

Quote:
Originally Posted by jdcaples View Post
18kms?
sorry I missed a 0 and meant to say 108kms.
Wileycoyote is offline   Reply With Quote
Old 05-22-2007, 07:01 AM   #18
sikwan
06 T1N Can
 
sikwan's Avatar
 
Join Date: Sep 2006
Location: San Jose, CA
Posts: 7,717
Thanks: 941
Thanked 1,856 Times in 849 Posts
Default Re: Fuel Economy

Quote:
Originally Posted by gerrym51 View Post
i bet you drive 75 more than 55!
Believe it or not, Gerry, my wife gets on my case when I'm cruising at 55mph.

I haven't even been up to the limiter yet and my driving speed is usually 70mph. Since the fuel crisis, I've been hovering around 60mph (like that's going to make a difference ).
sikwan is offline   Reply With Quote
Old 05-22-2007, 07:14 AM   #19
mgjessop
 
mgjessop's Avatar
 
Join Date: Jan 2007
Location: San Diego
Posts: 354
Thanks: 0
Thanked 7 Times in 7 Posts
Default Re: Fuel Economy

Thank's for all the input... I just took a trip up to LA and back to San Diego today... Put on cruse at 55mph and got 28.2mpg with a little of stop and go traffic... I used a total of 8.1 gallons of diesel which cost at total of $24.50... I did the same trip last week and had the petal to the metal... Doing 75mph most of the time untill I hit the stop and go traffic of LA... I used 14.5 gallons of diesel that trip which cost me $43.50... By slowing down I saved about $20, it took me about 35min more in travel time, but I think it was worth the Saving's... I drive about 60,000 miles a year by slowing down I know I can save $1000's... Best of luck to all and thank you guy's so much for all the advice and help...
mgjessop is offline   Reply With Quote
Old 05-22-2007, 07:22 PM   #20
BaywoodBill
pre-Yuppiedom
 
BaywoodBill's Avatar
 
Join Date: Sep 2006
Posts: 2,224
Thanks: 88
Thanked 90 Times in 74 Posts
Default Re: Fuel Economy

Quote:
Originally Posted by pvsprinter View Post
Are high roof versions smarter than standard roof height (bigger forehead)??

Bob
__________________
Baywood Bill

2005 2500 cargo, long, tall
BaywoodBill is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 08:34 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.