1100+ mile trip with GL320, 26+ mpg.
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Joined: Aug 2008
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From: Fredericksburg, VA
2008 E320 Bluetec, 2008 GL320 CDI
1100+ mile trip with GL320, 26+ mpg.
Just went on a trip from Fredericksburg VA to Crossville Tennessee. I wound up getting better than 26mpg, this mileage was calculated by hand. Avg speed by OBC was 68mph, that includes speed zones from 25mph to 70mph. This included about 25 miles of towing a 2,500 lb trailer and the entire trip was in the rain, sometimes heavy rain and hilly terrain up and down I81.
I found this mileage to be incredible for the size vehicle. Just thought I would pass this on.
Bryan
I found this mileage to be incredible for the size vehicle. Just thought I would pass this on.
Bryan
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Joined: Aug 2008
Posts: 79
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From: Fredericksburg, VA
2008 E320 Bluetec, 2008 GL320 CDI
yep yep
I knew it would be good, but given the weather and 'poorer' fuel mileage in rain, I never expected it to be this good. Matter of fact at one point I thought my gas gauge was not moving, I was at slightly less than a half tank with 550 miles and the gauge hadn't moved for loooong time. Wonderful surprise. It is just as quiet as my E320 Bluetec and just as smooth. The seats aren't as good as the E but 8.5 hours each way and my back never hurt, so no complaints there.
My pet peeve is who in the world is actually testing these diesel vehicles and coming up with crappy fuel mileage? The highlander hybrid does not even compare. (We actually looked at it, but decided we wanted more than 6" of space between the third row headrest and the backwindow) The yukon hybrid, no thanks.
Just totally pleased. The GL does have a few issues, but they are minor compared to what you are getting. (Minor as long as you have a way to jump start the car if the battery dies.) This has only happened once and hopefully has been solved now.
As a side note, all our vehicles are diesel now.
Jetta TDI, E320 and now GL320. Even our house runs on diesel. ;0
Bryan
My pet peeve is who in the world is actually testing these diesel vehicles and coming up with crappy fuel mileage? The highlander hybrid does not even compare. (We actually looked at it, but decided we wanted more than 6" of space between the third row headrest and the backwindow) The yukon hybrid, no thanks.
Just totally pleased. The GL does have a few issues, but they are minor compared to what you are getting. (Minor as long as you have a way to jump start the car if the battery dies.) This has only happened once and hopefully has been solved now.
As a side note, all our vehicles are diesel now.
Jetta TDI, E320 and now GL320. Even our house runs on diesel. ;0
Bryan
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Joined: Jul 2007
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From: Dallas, TX
GL320 CDI, SL550
Curious...
I have never calculated mpg by hand, the on-board computer shows me getting only about 20-21 MPG in my GL320. Are your calculations that much better than what the on-board computer says?
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Joined: Aug 2007
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From: Spicewood, TX
2008 GL 320, 2007 Silverado LTZ C3500 Duramax Turbo Diesel
Our GL 320 has never reached 25 mpg, usually 22-24. It has only been on one trip of 400 miles, for which it was driven pretty aggressively.
Last edited by scottybdiving; Mar 17, 2009 at 04:25 PM.
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Joined: Mar 2008
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From: B.C.
GL 320cdi, Chevrolet Avalanchero, GLE 350 (on order)
I had understood that modern trip computers like ours are tied into the fuel management software' and were pretty error-free.
Maybe it is something in the units conversion because mine has only ever been out by very little when I have done it by hand. You also have to trust your distance/ odo.
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Joined: Dec 2006
Posts: 405
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From: Scottsdale, AZ
2007 GL320 CDI, 2001 TJ Rockcrawler, 2005 Scoobie STI
My Fuel Mileage as listed in the computer has consistently been erring on the low side... Sometimes as much as 2-3 MPG... I tested it on several long trips 800-1000 miles plus where I calculated the fuel consumed to the miles on the odometer...
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Thread Starter
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Joined: Aug 2008
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From: Fredericksburg, VA
2008 E320 Bluetec, 2008 GL320 CDI
some examples of different mpg MFDs...
My VW tdi mpg MFD is always high, in other words it will show 52mpg when in reality I am getting 46mpg. I only use the mpg counter for each tank, basicly I only care about the avg fuel used per tank.
My E320 is mpg MFD is slightly high but only ever by 1 or 1.5 mpg, so relatively accurate.
The GL320 seemed a bit low, if is remember correctly I was showing 25mpg and change on the MFD, when calculated I was getting something like 26.2 or so.
Steady rate speed is what the diesels are all about, nothing new to us. The sweet spot on the GL seems to be around 70mph or so. My mileage at 70-72 was better than my mileage at 55 to 60, but this could have been due to many variables. My hunch is at 70mph the car is running more efficiently, I didn't notice a mileage drop off until around 77mph.
Bryan
My E320 is mpg MFD is slightly high but only ever by 1 or 1.5 mpg, so relatively accurate.
The GL320 seemed a bit low, if is remember correctly I was showing 25mpg and change on the MFD, when calculated I was getting something like 26.2 or so.
Steady rate speed is what the diesels are all about, nothing new to us. The sweet spot on the GL seems to be around 70mph or so. My mileage at 70-72 was better than my mileage at 55 to 60, but this could have been due to many variables. My hunch is at 70mph the car is running more efficiently, I didn't notice a mileage drop off until around 77mph.
Bryan
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From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
Just a thought.
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From: FRESNO CA
GL550
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From: Haslett, Mi
2011 E350 4matic
that is phenomenal gas mileage, i am impressed.
I went to Vegas last weekend, when i turned off my car as i got home it said 29.9mpg.
20 bucks and a half tank of gas each way, not too shabby since i was doing 80 the whole time.
I went to Vegas last weekend, when i turned off my car as i got home it said 29.9mpg.
20 bucks and a half tank of gas each way, not too shabby since i was doing 80 the whole time.
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From: Spicewood, TX
2008 GL 320, 2007 Silverado LTZ C3500 Duramax Turbo Diesel
How much would it use pulling a horse trailer and 6 adults?
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From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
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Joined: Sep 2008
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From: Haslett, Mi
2011 E350 4matic
uhhhhhhhhh, obviously i know the two vehicles aren't the same - but thanks for that brilliant heads up. hey, the empire state building and my house are also different and each take different amounts of electricity, did you know that?
i was just making conversation and comparing that a much larger vehicle with much more weight got about the same mileage but i also learned a GL is not same as my C: sweet.
i was just making conversation and comparing that a much larger vehicle with much more weight got about the same mileage but i also learned a GL is not same as my C: sweet.
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From: Overland Park, KS
‘24 BMW iX M60
I have also seen great mileage with the CDI. We returned from Boulder, CO last October, and at an average speed of 75 mph, (over 550 miles), we managed to get 25.9 mpg according to the on-board computer.
However, the GL is extremely susceptable to strong headwinds as going to Boulder, we only managed 19.9 mpg. This was during a severe winter storm though.
Bish
However, the GL is extremely susceptable to strong headwinds as going to Boulder, we only managed 19.9 mpg. This was during a severe winter storm though.
Bish
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From: Spicewood, TX
2008 GL 320, 2007 Silverado LTZ C3500 Duramax Turbo Diesel
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From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
MBWorld Fanatic!
Joined: May 2007
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From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
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From: Nv & So. CA
2008 GL 320 CDI
28.1 highway for a 975 mile trip from Las Vegas to Carson City and back. This 2008 vehicle has 11,000 miles.
I had the cruise set to 80 when possible, and at places, passed other vehicles at 95+.
I was more than impressed.
When I first purchased the vehicle, I was getting around 26 MPG on the highway.
I had the cruise set to 80 when possible, and at places, passed other vehicles at 95+.
I was more than impressed.
When I first purchased the vehicle, I was getting around 26 MPG on the highway.
