Which MPH gives the best MPG ?
MBWorld Fanatic!
Joined: Dec 2003
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From: BC, Canada
2003 C230K Coupe Orion Blue
You want to stay at the maximum torque bit in theory.
I may be no engine expert, but something tells me this also doesn't quite work because when they run these graphs they're at WOT. I would imagine that the sweet spot shifts (with respect to RPM) depending on how much throttle you give. It probably doesn't change around by *that* much though.
I may be no engine expert, but something tells me this also doesn't quite work because when they run these graphs they're at WOT. I would imagine that the sweet spot shifts (with respect to RPM) depending on how much throttle you give. It probably doesn't change around by *that* much though.
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Joined: Sep 2010
Posts: 134
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2006 E320 CDI 235 hp 420 ft tq
I filled up yesterday and for the first time the heads up miles per gallon average was right on the money. Most times it off up to two mpg.
I never fill up unless I have used over a half of a tank, so I don't know if its right on short trips.
I never fill up unless I have used over a half of a tank, so I don't know if its right on short trips.
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From: NOMAD
EQS AMG, E53 AMG, GLE63s
i was bored and thought bout this thread......i was looking at my miles left in tank meter.....filled up gas and hit the road
at 60MPH= 499miles
at 65MPH= 504miles
at 70MPH= 493miles
at 75MPH= 450miles
at 80MPH= 403miles
I changed speeds at every 30 miles.....get 65mph is the best
at 60MPH= 499miles
at 65MPH= 504miles
at 70MPH= 493miles
at 75MPH= 450miles
at 80MPH= 403miles
I changed speeds at every 30 miles.....get 65mph is the best
Thread Starter
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Joined: Sep 2006
Posts: 169
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From: Socal
06' w211 E500 Sport
i was bored and thought bout this thread......i was looking at my miles left in tank meter.....filled up gas and hit the road
at 60MPH= 499miles
at 65MPH= 504miles
at 70MPH= 493miles
at 75MPH= 450miles
at 80MPH= 403miles
I changed speeds at every 30 miles.....get 65mph is the best
at 60MPH= 499miles
at 65MPH= 504miles
at 70MPH= 493miles
at 75MPH= 450miles
at 80MPH= 403miles
I changed speeds at every 30 miles.....get 65mph is the best
So what model are you driving? I'm going to fill up soon and look into this and report back.... (e500 sport)
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Joined: May 2010
Posts: 218
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03 E320, 03 Lexus RX300
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.
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Joined: Sep 2007
Posts: 25
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From: SoCal, USA
95 s124 Estate, 69 911RS (tribute), 93 Toyota Pickup (DD)
I believe a lot factors contribute to average MPG. (ie: aerodynamic add ons (wings and things), unsprung weight, & tire pressure) Just did a road trip from SoCal to Laguna Seca Raceway and couldn't better 21-22 mpg...and that was at 75-80 mph with the cruise control!
My car is a box stock E320 with no aerodynamic upgrades. But, it has Brabus sport suspension (lowered about 55mm) with 8.5x20 and 10x20 Mandrus Milleniums running about 40psi. I have to push a heavy a$$ wheel that's wide as as a school bus through the air
I know that has a lot to do with my low AMPG. Hope this helps.
My car is a box stock E320 with no aerodynamic upgrades. But, it has Brabus sport suspension (lowered about 55mm) with 8.5x20 and 10x20 Mandrus Milleniums running about 40psi. I have to push a heavy a$$ wheel that's wide as as a school bus through the air
I know that has a lot to do with my low AMPG. Hope this helps.
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Joined: Apr 2002
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From: Basel, Switzerland
Audi A5 Sportback + Cannondale Prophet
i was bored and thought bout this thread......i was looking at my miles left in tank meter.....filled up gas and hit the road
at 60MPH= 499miles
at 65MPH= 504miles
at 70MPH= 493miles
at 75MPH= 450miles
at 80MPH= 403miles
I changed speeds at every 30 miles.....get 65mph is the best
at 60MPH= 499miles
at 65MPH= 504miles
at 70MPH= 493miles
at 75MPH= 450miles
at 80MPH= 403miles
I changed speeds at every 30 miles.....get 65mph is the best
60 = 499+30 = 529
65 = 504+60 = 564
70 = 493+90 = 583
75 = 450+120 = 570
80 = 403+150 = 553
And even so , the adjustments are run at the cobination of previous speeds so it is not totally accurate.
Where are the mythbusters when you need them.
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Joined: Apr 2007
Posts: 61
Likes: 0
From: New Hampshire
'04 C320 4matic Wagon (sold),'15 E350 4Matic(sold),'14 E550 convertible,'20 GLC300
Reviving an old thread.
55 MPH appears to be my sweet spot. That being said I averaged 40.8 mpg on a recent trip doing about 65 MPH. Later in the trip I wanted to see how high it would go and I dropped it down to 55 for a while and I hit 43 mpg average. I could get it higher if did crazy hyper-miler stuff and running on my summer tires jacked up to 35 psi, but I'm pretty pleased with getting 40 mpg with a 4000 lbs luxury car on winter tires just driving conservatively.
55 MPH appears to be my sweet spot. That being said I averaged 40.8 mpg on a recent trip doing about 65 MPH. Later in the trip I wanted to see how high it would go and I dropped it down to 55 for a while and I hit 43 mpg average. I could get it higher if did crazy hyper-miler stuff and running on my summer tires jacked up to 35 psi, but I'm pretty pleased with getting 40 mpg with a 4000 lbs luxury car on winter tires just driving conservatively.
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Joined: Oct 2011
Posts: 115
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From: North OC, SoCal
2013 CLS550, 2013 GLK350 4-Matic
Here are a couple of pictures from last Sunday's trip in my 2008 E550. Trip started in Flagstaff, AZ and ended in Orange County, CA. First shot is from Flagstaff to near CA border – all on I-40 (safely shot by wife on an empty straight section of road
). Second is in my driveway. No stops for gas. The E550 is amazing - 382 hp in a 3900 lb car and nearly 28 mpg at 80+ mph.
Mike
). Second is in my driveway. No stops for gas. The E550 is amazing - 382 hp in a 3900 lb car and nearly 28 mpg at 80+ mph.Mike
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Joined: Apr 2007
Posts: 61
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From: New Hampshire
'04 C320 4matic Wagon (sold),'15 E350 4Matic(sold),'14 E550 convertible,'20 GLC300
Shaking my head at Mike's post with a picture of a 170 mile trip averaging 82 mph. To average that kind of speed around these parts of the country, the crowded northeast, you'd either get your licence revoked or crash horribly, possibly both.
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Joined: Sep 2009
Posts: 7,671
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From: NOMAD
EQS AMG, E53 AMG, GLE63s
I am going to be driving 800 miles to ATL for NYE so I will definitely seeing what is my sweet spot. Mine before was between 65-70 but that 82 is AWESOME for open road I am going to have!
P.S. do you have any mods such as exhausts/filters that would effect MPG?
P.S. do you have any mods such as exhausts/filters that would effect MPG?
Member
Joined: Oct 2011
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From: North OC, SoCal
2013 CLS550, 2013 GLK350 4-Matic
Mike
Junior Member
Joined: Apr 2007
Posts: 61
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From: New Hampshire
'04 C320 4matic Wagon (sold),'15 E350 4Matic(sold),'14 E550 convertible,'20 GLC300
We had a choice of taking I-10 or I-40 home. I-10 is more popular with both drivers and LEOs. I-40 has mainly big rigs who exhibit excellent lane discipline, so that's the way we went. The speed limit on I-40 in AZ is 75 mph - so "Officer, you say I'm only 7 over? Probably just speedometer error, right?"
Mike
Mike
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Joined: Oct 2011
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From: North OC, SoCal
2013 CLS550, 2013 GLK350 4-Matic
Mike
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SL55, S500
115 mph and 5th gear.
RPM"s were at 2100-2300 and I was tapping the gas 1/20 th down just to sustain the speed.
I covered the distance in half the time and saved half the gas I would have used, who knew !
RPM"s were at 2100-2300 and I was tapping the gas 1/20 th down just to sustain the speed.
I covered the distance in half the time and saved half the gas I would have used, who knew !
Super Member
Joined: Sep 2003
Posts: 783
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From: Murrieta, Southern California
Late Built 2005 W-211 E-320 CDI
Say What?
No way my friend.
No MBZs has that tall gearing.
My E-320 CDI has 2.65s X 0.83 times the tire revs equals only 1782 rpms per mile or at 60 mph.
At 115 MPH, that figures out to almost 3400 RPMs.
D
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Joined: Aug 2011
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From: NS
2017 GLC43 'AMG'
When we drove from Nova Scotia to Key West this summer (8600 km round trip), I drove very gently for the first couple of hours and was rewarded with 8.6 L per 100 km (27.3 MPG US). By then we all got bored of fuel-economy driving style, so I drove 'normally' for the rest of the trip and got 10.5 L per 100 km (22.4 MPG US).
The car was loaded close to the maximum weight limit (five people plus luggage).
Not much difference in average speed, big difference in staying off the gas pedal.
The car was loaded close to the maximum weight limit (five people plus luggage).
Not much difference in average speed, big difference in staying off the gas pedal.
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Joined: Sep 2003
Posts: 783
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From: Murrieta, Southern California
Late Built 2005 W-211 E-320 CDI
"115 mph and 5th gear.
RPM"s were at 2100-2300 and I was tapping the gas 1/20 th down just to sustain the speed."
If he has the same gears as my car (2.65s?) then that would not be exactly correct.
2100 rpms would equal 113.7 kph. (Very close but?)
2300 rpms would be 124.5 kph.
We need to know exactly which car he has, what size tires and wheels it has and what rearend
gears are in his car and which gear in the tranny (five or seven speed) he's using?
He is stating mph, not kph.
D
