Which MPH gives the best MPG ?
Member
Joined: Jun 2009
Posts: 234
Likes: 2
2006 E320 CDI
55 mph
Aerodynamic drag increases with the square of velocity while frictional forces stay fairly constant. That means you need to work 4X as hard to go 2X as fast w.r.t. aerodynamic drag. Very little drag at low speeds, but when you hit about 50 mph it gets pretty significant. At about that point slower = better for mileage. If you have to downshift, to cruise at the slower speed, that is a problem, of course.
http://www.atmosphere.mpg.de/enid/In..._drag_507.html
http://www.atmosphere.mpg.de/enid/In..._drag_507.html
Super Member
Joined: Sep 2003
Posts: 783
Likes: 1
From: Murrieta, Southern California
Late Built 2005 W-211 E-320 CDI
A Four Cylinder
Doesn't that taxi in your picture have 'E-200' on the left side of the trunk?
Hard to tell on my computer, but if so, I will bet the four cylinder
motors do much better fuel economy wise than do the E-320s.
What exact size and torque do the four cylinder E-200s have?
Also, what gear box and rearend ratios.
D
Member
Joined: Apr 2014
Posts: 204
Likes: 2
E320
Here's my normal mileage after a 25 mile drive to work, includes uphill, downhill, 2nd gear creeping and one 20 second stoplight. Did 65mph for the most part with drops to 60mph
Garden State Pwky southbound in north nj.
RWD E320 with 99,000 miles
I just changed my air filters and wiped clean the tubes on the manifold. Going to do spark plugs this weekend hopefully I'll crank abit more mpg out of it.
Garden State Pwky southbound in north nj.
RWD E320 with 99,000 miles
I just changed my air filters and wiped clean the tubes on the manifold. Going to do spark plugs this weekend hopefully I'll crank abit more mpg out of it.
Jesus! how's that even possible? is this petrol or diesel ?
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Joined: Aug 2013
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2006 E320 CDI 2014 C63 507 Coupe 2012 E550 4M 2016 E63s Wagon
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MBWorld Fanatic!
Joined: May 2007
Posts: 1,252
Likes: 18
From: Blaine, WA
07 E320 Bluetec
When I drive normally at 70mph, I average 32mpg.
With my driving style, combined with my tire and suspension setup, I average around 29mpg on my 2007 Bluetec Diesel; I'm happy.
With my driving style, combined with my tire and suspension setup, I average around 29mpg on my 2007 Bluetec Diesel; I'm happy.
MBWorld Fanatic!
Joined: Aug 2013
Posts: 1,365
Likes: 61
2006 E320 CDI 2014 C63 507 Coupe 2012 E550 4M 2016 E63s Wagon
^^^My 18" staggard knock at least 2 MPG off compared to the 16". But the grip is worth it - all that torque need some rubber.
You have some nice mods on that car.
You have some nice mods on that car.
Member
Joined: Apr 2014
Posts: 204
Likes: 2
E320
i gotta change my spark plugs...
Here's my normal mileage after a 25 mile drive to work, includes uphill, downhill, 2nd gear creeping and one 20 second stoplight. Did 65mph for the most part with drops to 60mph
it is still unbelievable...
Here's my normal mileage after a 25 mile drive to work, includes uphill, downhill, 2nd gear creeping and one 20 second stoplight. Did 65mph for the most part with drops to 60mph
it is still unbelievable...
Member
Joined: Sep 2006
Posts: 228
Likes: 42
From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
My daily commute is 150 miles r/t with light traffic and only one minor hill (400') so I have a lot of opportunity to try minor changes on the same 'test circuit'.
For the past 15,000 miles I have been averaging 27.1 mpg in my E550 w/7sp with an average speed of 50mph (80% fwy & 20% city for me). The sweet spot for mileage seems to be 60-65 mph. If I drive at 70 mph I can definitely notice a drop in mileage.
The has just been my personal experience and is completely anecdotal. Your Mileage May Vary .
For the past 15,000 miles I have been averaging 27.1 mpg in my E550 w/7sp with an average speed of 50mph (80% fwy & 20% city for me). The sweet spot for mileage seems to be 60-65 mph. If I drive at 70 mph I can definitely notice a drop in mileage.
The has just been my personal experience and is completely anecdotal. Your Mileage May Vary
.
Newbie
Joined: Jun 2024
Posts: 1
Likes: 0
2004 ML350
I'm in Australia and our road speed limits are childishly low IMO.
I've gotten 26-27mpg on my 03 e500. That's driving 50miles each way (total 100 miles), windows up, behind others in the middle lane, 55-60-65mph(incline/decline), not on cruise, outside temp around 75 degrees F, 99% highway. One warmer morning, i got 30mpg driving one way, but from Westchester to the Bronx (mostly a decline).
Last edited by Mr Lizard; Jun 28, 2024 at 10:58 PM.
MBWorld Fanatic!
Joined: Jan 2024
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From: DFW
SL63
Back in the day, I drove a Toyota Supra from California to New York via Spokane Washington. Most of that trip averaged 20-25mpg averaging 70mph. On one leg in ND, with a 30 knot tailwind out of the west, I got 30mpg for that tank. I was so enthralled with the range I was getting, I pressed my luck well into the low fuel light by tracking the distance to the next exit with gas. I came up a mile short when my engine quit. I wasn’t looking forward to the mile walk to the gas station, buying a gas can, and humping the gas back to the car. After sitting in the car a few minutes considering my options, I decided to try to attempt a start. It started right up. I guess that remaining gas had time to settle, and I had just enough for the last mile.
All that to say that wind has a significant effect on mileage. Headwinds increase drag. Crosswinds increase drag. Tailwinds decrease drag.As an early poster pointed out, it’s that 1/2rhoVsquared thing combined with trigonometry.
All that to say that wind has a significant effect on mileage. Headwinds increase drag. Crosswinds increase drag. Tailwinds decrease drag.As an early poster pointed out, it’s that 1/2rhoVsquared thing combined with trigonometry.
Last edited by MB2timer; Jun 29, 2024 at 12:55 AM. Reason: 2nd para
Member
Joined: Oct 2017
Posts: 86
Likes: 11
From: Charlottesville, Virginia, USA.
2004 W211 E320 Sport
2004 E320
My '04 E320 Sport gets approx 29mpg at Interstate highway speeds of 70mph (unless it's in mountainous areas, where it's a bit lower), and about 22 mpg in city driving. 130,000 miles.
