E-Class (W212) 2010 - 2016: E 350, E 550
Sponsored by:
Sponsored by: CARiD

Saving gas

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Nov 3, 2022 | 12:09 PM
  #1  
El Cid's Avatar
Thread Starter
MBWorld Fanatic!
Veteran: Army
15 Year Member
Liked
Loved
 
Joined: Nov 2009
Posts: 2,616
Likes: 160
From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
Saving gas

This probably will not appeal to many, but if you want to save gas - drive the speed limit. I used to drive about 5 MPH over the speed limit and used cruise control whenever practical. Now I drive the speed limit and use cruise whenever practical (same amount of time). Overall I am getting 8%+ better gas mileage than before. Has been as high as 10% on some trips that I have repeated at both speeds. This is long term, not short time or distance test.
Reply
Old Nov 3, 2022 | 12:39 PM
  #2  
DFWdude's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Liked
Loved
Community Favorite
 
Joined: Apr 2006
Posts: 4,694
Likes: 1,829
From: Dallas-Ft.Worth,TX
2016 E350 Sport
Originally Posted by El Cid
This probably will not appeal to many, but if you want to save gas - drive the speed limit. I used to drive about 5 MPH over the speed limit and used cruise control whenever practical. Now I drive the speed limit and use cruise whenever practical (same amount of time). Overall I am getting 8%+ better gas mileage than before. Has been as high as 10% on some trips that I have repeated at both speeds. This is long term, not short time or distance test.
You are exactly right... On the Interstates, driving the posted limit (70mph) on Cruise versus 75 on cruise makes a huge difference. 70 is much more economical.
Reply
Old Nov 3, 2022 | 12:42 PM
  #3  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
My MPG skyrockets when I drive 40 mph on highway.
Reply
Old Nov 3, 2022 | 01:05 PM
  #4  
El Cid's Avatar
Thread Starter
MBWorld Fanatic!
Veteran: Army
15 Year Member
Liked
Loved
 
Joined: Nov 2009
Posts: 2,616
Likes: 160
From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
Originally Posted by kajtek1
My MPG skyrockets when I drive 40 mph on highway.
Actually it would probably be worse.
Reply
Old Nov 3, 2022 | 01:47 PM
  #5  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Originally Posted by El Cid
Actually it would probably be worse.
Not for me.
I am statistic freak and I record each fill up on fuelly.
My diesel will make 60 mpg @ 60 mph, but I never had patience to test it on long run, as I am satisfy with only 40 mpg, while averaging above 80 mph.
The very high mpg happens to me when sometimes I take streets route. Las Vegas main streets do have 45 mph limits, so if I get lucky to drive few miles without red lights, my trip meter goes very high. Not that I would make it statistic as those are just short trips at those speeds.
Reply
Old Nov 3, 2022 | 02:47 PM
  #6  
Fliplegend's Avatar
Member
 
Joined: Jul 2020
Posts: 224
Likes: 180
From: NE
S212 E350 Estate
Clear air intake filter and properly inflated tires would help as well. Although, hyper milers are usually not the kind that buy Benz.
Reply
Old Nov 3, 2022 | 03:33 PM
  #7  
Bahnstormer's Avatar
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2004
Posts: 1,358
Likes: 297
From: South Florida
2010 E63 AMG, 2003 E500
I understand this philosophy but I didn't buy an AMG to conserve fuel, just sayin'.
Reply
Old Nov 3, 2022 | 05:45 PM
  #8  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Originally Posted by Bahnstormer
I understand this philosophy but I didn't buy an AMG to conserve fuel, just sayin'.
Spending lot of time at gas pump you did not buy it for time saving neither?
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Nov 3, 2022 | 06:36 PM
  #9  
cetialpha5's Avatar
MBWorld Fanatic!
10 Year Member
 
Joined: Feb 2014
Posts: 6,190
Likes: 1,549
From: MA
2008 E350 4Matic, 2011 E350 4matic
Originally Posted by Bahnstormer
I understand this philosophy but I didn't buy an AMG to conserve fuel, just sayin'.
Yeah, I would think most people wouldn't buy a Mercedes if they wanted to save money on gas. It needs gas, I put it in, don't even really look at the total.

As for saving gas at 40mph, that's probably at the highest gear and the lower the speed, the less wind resistance so the better the gas mileage. There are some local parkways where the speed limit is 35 and if you do 40 in top gear, the gas mileage is pretty good.
Reply
Old Nov 3, 2022 | 07:48 PM
  #10  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Originally Posted by cetialpha5
Yeah, I would think most people wouldn't buy a Mercedes if they wanted to save money on gas. It needs gas, I put it in, don't even really look at the total.

As for saving gas at 40mph, that's probably at the highest gear and the lower the speed, the less wind resistance so the better the gas mileage. There are some local parkways where the speed limit is 35 and if you do 40 in top gear, the gas mileage is pretty good.
Count me as minority.
Mercedes diesels are the cheapest cars to drive from about 20 brands I did own. Obviously I don't buy them new to take initial depreciation heat.
For years, when I was buying older models, I was actually making money driving them as after 2-3 years of use, I sold them for more than I paid for.
My E250 BT will not hold the 7th gear below 60 mph, but amazingly the highest mpg comes on lower gear.
Air drag is what affect the fuel consumption at very high percentage. It increase with square of speed, meaning at 60 mph it is 9 times higher than at 20 mph.

Last edited by kajtek1; Nov 3, 2022 at 08:00 PM.
Reply
Old Nov 4, 2022 | 03:00 AM
  #11  
BenzV12's Avatar
MBWorld Fanatic!
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2011
Posts: 4,372
Likes: 945
W212 FL
Driving too slow also kills MPG or not as efficient as cruising at a set speed either. I take it you should not exceed 2000 RPM when driving and keep a constant speed as the traffic allows. I like to see an extended range, but fuel economy is not my top priority either. However, driving the car without spoiling the driving pleasure is and having an extended range is a cream of the cake to me
Reply
Old Nov 4, 2022 | 10:19 AM
  #12  
DFWdude's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Liked
Loved
Community Favorite
 
Joined: Apr 2006
Posts: 4,694
Likes: 1,829
From: Dallas-Ft.Worth,TX
2016 E350 Sport
Originally Posted by BenzV12
Driving too slow also kills MPG or not as efficient as cruising at a set speed either. I take it you should not exceed 2000 RPM when driving and keep a constant speed as the traffic allows. I like to see an extended range, but fuel economy is not my top priority either. However, driving the car without spoiling the driving pleasure is and having an extended range is a cream of the cake to me
Not odd that you note this, because at 70mph on Cruise on the Interstate, my E350 turns right at 1950 rpm, all day long.

I don't recall what it turns at 75mph, but I drive 600 mile trips on the interstate frequently. I can rack up the fuel mileage on the center display at 70mph for several hours (33-35mpg), and watch it predictably fall when I purposefully push the cruise to 75mph for the next hour or so.

Last edited by DFWdude; Nov 4, 2022 at 10:24 AM.
Reply
Old Nov 4, 2022 | 11:47 AM
  #13  
retna7's Avatar
Senior Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2006
Posts: 277
Likes: 77
From: Alexandria, VA
2000 E430 Sport
Just make sure you're getting what you pay for in the first place...

Reply
Old Nov 4, 2022 | 05:03 PM
  #14  
El Cid's Avatar
Thread Starter
MBWorld Fanatic!
Veteran: Army
15 Year Member
Liked
Loved
 
Joined: Nov 2009
Posts: 2,616
Likes: 160
From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
One thing I forgot to mention is that the price of gas is based on three factors: supply, demand and greed. Can't do anything about greed, but the less gas people use, the greater the supply becomes. Therefore the price of gas (and diesel) will go down. Just sayin'
Reply
Old Nov 4, 2022 | 07:24 PM
  #15  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Originally Posted by El Cid
One thing I forgot to mention is that the price of gas is based on three factors: supply, demand and greed. Can't do anything about greed, but the less gas people use, the greater the supply becomes. Therefore the price of gas (and diesel) will go down. Just sayin'
You forgot
"POLITICAL DONATIONS" or "presidential campaign contributions"
Reply
Old Nov 5, 2022 | 01:41 PM
  #16  
Andre91's Avatar
Member
 
Joined: Oct 2016
Posts: 208
Likes: 46
2012 E350 4Matic
Originally Posted by Fliplegend
Clear air intake filter and properly inflated tires would help as well. Although, hyper milers are usually not the kind that buy Benz.
The tires themselves have an impact on fuel economy as well, different tread patterns and compounds have different amounts of rolling resistance. Winter tires especially with both an aggressive tread and softer compound have an adverse effect on fuel economy, but the safety benefits outweigh the small amount of extra fuel burned.
Reply
Old Nov 6, 2022 | 11:04 AM
  #17  
John H's Avatar
Member
15 Year Member
Liked
 
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 commute is 88 miles each way, four times per week, so I watch my fuel consumption closely.
I have a chipped E550 and my Fuelly mpg is 23.8 for the last 40,000 miles (25.9 on the dash gauge), and I always make sure to get a few full throttle blasts each trip.
I avoid being the lead car on the freeway and try to find someone with a stable MPH to follow even if it's a few MPH below my target.
Forty years ago I had a Ford with similar horsepower (428 with 3/2's) and was getting 8 MPG so getting three times more MPG seems unreal. Thank you, Mercedes.
Reply
Old Nov 6, 2022 | 02:58 PM
  #18  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
My father's 1969 Buick Riviera was making 5-6 mpg.
I drove it couple of times and with tank range about 200 miles run out of fuel.
So the 40mpg at high-speed cruising giving me solid 700 miles on the tank are really appreciated.
Years ago I selling W124 diesel with over 200k miles. The buyer was a guy who just got job requiring long commute, so he figured out he needs diesel to make it economical.
The 5-banger in W124 was delivering close to 40 mpg, although the ca 130 HP was a bit sluggish. Why would anybody in his right state of mind spend $600 a month for fuel, when he could make it for 1/2 of that with the same comfort?
Not even trying to compare resale value, who likely would be even lower than 2-fold

Last edited by kajtek1; Nov 6, 2022 at 03:03 PM.
Reply
Old Nov 6, 2022 | 03:05 PM
  #19  
cetialpha5's Avatar
MBWorld Fanatic!
10 Year Member
 
Joined: Feb 2014
Posts: 6,190
Likes: 1,549
From: MA
2008 E350 4Matic, 2011 E350 4matic
Originally Posted by kajtek1
You forgot "POLITICAL DONATIONS" or "presidential campaign contributions"
I don't think he forgot. Gas is basically a global commodity and really beyond the power of one president of one country to control. It basically just boils down to supply and demand.
Reply
Old Nov 6, 2022 | 03:18 PM
  #20  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Originally Posted by cetialpha5
I don't think he forgot. Gas is basically a global commodity and really beyond the power of one president of one country to control. It basically just boils down to supply and demand.
So would you care why 40-60 mpg cars are banned from import to USA, when >10 mpg behemoths are highly promoted?
Did you ever check how much oil industry participate in presidential campaign contributions?
Reply
Old Nov 6, 2022 | 03:34 PM
  #21  
cetialpha5's Avatar
MBWorld Fanatic!
10 Year Member
 
Joined: Feb 2014
Posts: 6,190
Likes: 1,549
From: MA
2008 E350 4Matic, 2011 E350 4matic
Originally Posted by kajtek1
So would you care why 40-60 mpg cars are banned from import to USA, when >10 mpg behemoths are highly promoted?
Did you ever check how much oil industry participate in presidential campaign contributions?
Ultimately it's the people who buy the cars. Not everyone cares about gas mileage is basically what the answer is. You've got to use Occam's razor. People put gas in their cars several times a month, you think the oil industry and the president is forcing those people to pay high prices for the gas they put in their SUV/trucks when they're the ones deciding on buying the SUVs/trucks in the first place? There are cars out there with small gas engines and hybrids that get good gas mileage. But guess what, after peaking a few years ago, Prius sales are way down. The US just has tighter emissions than Europe, always has. Nothing new there.
Reply
Old Nov 6, 2022 | 06:13 PM
  #22  
DFWdude's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Liked
Loved
Community Favorite
 
Joined: Apr 2006
Posts: 4,694
Likes: 1,829
From: Dallas-Ft.Worth,TX
2016 E350 Sport
Originally Posted by cetialpha5
Ultimately it's the people who buy the cars. Not everyone cares about gas mileage is basically what the answer is. You've got to use Occam's razor. People put gas in their cars several times a month, you think the oil industry and the president is forcing those people to pay high prices for the gas they put in their SUV/trucks when they're the ones deciding on buying the SUVs/trucks in the first place? There are cars out there with small gas engines and hybrids that get good gas mileage. But guess what, after peaking a few years ago, Prius sales are way down. The US just has tighter emissions than Europe, always has. Nothing new there.
Back in the 60's all cars got 6-7mpg because that's all that was available. The invasion of Japanese imports brought some relief (although my stick-shift '77 Honda Accord got little more than 20mpg).

Prius sales are flagging because of the rise in Electric vehicles.

Today, there is a wide variety of vehicles with similarly wide variances in fuel mileage. But it's difficult to feel empathy for the 8 out of 10 clowns here in Texas who demand to drive 3-4 ton SUV/trucks with their 9-12mpg... then they are the first to biatch about it. No sympathy for the poorly educated.

I'm not convinced that American emissions standards are tighter than Europe.
Reply
Old Nov 6, 2022 | 10:15 PM
  #23  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Prius in fuel economy is comparable to my E250, while delivering way lower comfort.
Giving econobox samples as why US citizens don't buy them is totally wrong.
Let's kick the politicians and start bringing 40 mpg station wagons to this country, who can seat 7 and tow 3 tons behind?
Let's see if SUV market will not make sudden swing?
Reply
Old Nov 6, 2022 | 11:29 PM
  #24  
ghlkal's Avatar
MBWorld Fanatic!
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2015
Posts: 1,071
Likes: 349
From: Fredonia, WI
2012 E550 v8-Biturbo
Originally Posted by John H
I have a chipped E550 and my Fuelly mpg is 23.8 for the last 40,000 miles (25.9 on the dash gauge), and I always make sure to get a few full throttle blasts each trip.

Forty years ago I had a Ford with similar horsepower (428 with 3/2's) and was getting 8 MPG so getting three times more MPG seems unreal. Thank you, Mercedes.
I too am amazed. My commute is mostly highway, and I average a true 25mpg. After it is warm, I do WOT on the on-ramp, but I cruise at the speed limit. For a car that weighs this much with this much power, the MPG is really something.
Reply
Old Nov 7, 2022 | 10:08 PM
  #25  
Quint22's Avatar
Super Member
Veteran: Navy
 
Joined: Jun 2022
Posts: 739
Likes: 328
From: WA State, USA
2014 Cummins, 2014 E250 Bluetec
Originally Posted by DFWdude
Back in the 60's all cars got 6-7mpg because that's all that was available. The invasion of Japanese imports brought some relief (although my stick-shift '77 Honda Accord got little more than 20mpg).

Prius sales are flagging because of the rise in Electric vehicles.

Today, there is a wide variety of vehicles with similarly wide variances in fuel mileage. But it's difficult to feel empathy for the 8 out of 10 clowns here in Texas who demand to drive 3-4 ton SUV/trucks with their 9-12mpg... then they are the first to biatch about it. No sympathy for the poorly educated.

I'm not convinced that American emissions standards are tighter than Europe.
Those texans just need to get diesel trucks so they can get 20+mpg on those long trips or get a 1/2ton diesel and get 30+mpg .... oh yeah they discontinued all those.

Prius IMHO are garbage but some like em. The standard ones dont get better then my 14' e250 on the freeway at 70mph and they dont acomidate 6'2" guys very well.

I think the USA emissions are more motivated by a direction the epa wants to go in like banning diesel. I would think its way more political on that front over here. Not sure though just my guess. Its all a big crap show.
Reply


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 03:45 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE