C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe
View Poll Results: how much do you spend on gas for your car per month?
less than $25
1
1.61%
$25 to $50
16
25.81%
$51 to $75
9
14.52%
$76 to $100
20
32.26%
more than $100
16
25.81%
Voters: 62. You may not vote on this poll

The C-Class GAS MILEAGE thread

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Old 09-11-2007 | 02:35 PM
  #351  
trisonics's Avatar
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From: Scottsdale, AZ
2002 C230K Coupe
Originally Posted by LanceO
Did you find out what was the problem? I have the exact same issue where I get around 22L/100KM and then it goes slowly down to 12L/100KM usally

Ofcourse! As soon as you start your car your mileage should ideally read 0 mpg. But it starts somewhere around 15 mpg and goes down pretty quick if you are idling. The reason being that you are consuming the gas while idling and putting on '0' miles, so mpg = 0/whatever gas consumed = grand ZERO. When you start moving, the mpg starts increasing.
Old 09-11-2007 | 03:00 PM
  #352  
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From: Long Island, NY
C3Twon AWD Jumpofffff
Originally Posted by spyderpig
Have u tried this fuel additive??? it might help a little...

http://www.parkplacestores-mb.com/mefuad.html

its kind of pricey, does it work better than the other fuel additives in the auto parts store???
Old 09-11-2007 | 06:14 PM
  #353  
C230 Sport Coup's Avatar
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort (What the heck, it gets 38 mpg!)
Originally Posted by LanceO
Did you find out what was the problem? I have the exact same issue where I get around 22L/100KM and then it goes slowly down to 12L/100KM usally
I think this is normal.
Any car uses more fuel until it warms up.

I see the 'other' C230 Sport Coup(e) person has been banned, so I don't think he'll be able to answer...I don't see anything in his previous posts that might have caused it..
hmmm...well he did keep asking how to change an 02 sensor, which is a one bolt, one plug, self explanatory issue and he refused to simply LOOK.

Maybe that was it. I dunno!
Old 09-12-2007 | 08:46 PM
  #354  
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From: NorCal
'02 CL203 M111
Originally Posted by BlackLiquorish8
its kind of pricey, does it work better than the other fuel additives in the auto parts store???
yeah i know it is not cheap and it worked for me but just a little.
i drove from Sacramento to San Francisco with 27mpg. then change the filter and sparkplugs... i hit 31mpg... then use additive and hit 32mpg. now i dont know if it is better than other ones coz never tried. but yeah if you re warming up your car the mpg after start will decrease to 16mpg after around 5min of idl.
Old 09-21-2007 | 07:54 AM
  #355  
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Mercedes
Originally Posted by C230 Sport Coup
I think this is normal.
Any car uses more fuel until it warms up.

I see the 'other' C230 Sport Coup(e) person has been banned, so I don't think he'll be able to answer...I don't see anything in his previous posts that might have caused it..
hmmm...well he did keep asking how to change an 02 sensor, which is a one bolt, one plug, self explanatory issue and he refused to simply LOOK.

Maybe that was it. I dunno!
He was banned for extenuating circumstances.

Changing the MAF and primary O2 sensor helped gas mileage after warm-up. Going to change the secondary O2 sesnor and see if it improves it further.

BTW the plug for the primary O2 sensor wasn't exactly straight forward to find, it took jacking up the car and taking off the underbody panels.

My guess is that its the leaky hose under the intake. Its a $12 part and an easy DIY, so going to change that too when it arrives. After that, dunno.
Old 09-21-2007 | 05:32 PM
  #356  
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From: Orlando, Fl
My gas sipping C-Class
Gas Mileage on my way home....Can you beat this?

so, I filled up before I left Melbourne and this was my average after pulling into my driveway....I think I could have got a few more tenths, had it not rained during part of the trip...the rain increases the rolling resistance...No down hill stuff either...Florida is flat!
This is with 110,000 + miles on a car with the original spark plugs.

Old 09-21-2007 | 05:35 PM
  #357  
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From: Orlando, Fl
My gas sipping C-Class
1 more note.....I had averaged 73 mph most of the way home, until I got into town and hit traffic and stop lights.....I was also almost at 38mpg before having to stop for a few lights and stop signs.

Who the heck needs a Prius anyways!
Old 09-21-2007 | 06:29 PM
  #358  
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From: Ocala fl
2006 SLK 280
Crap i am getting 21MPG. Have to drive hwy more
Old 09-21-2007 | 06:32 PM
  #359  
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From: Ocala fl
2006 SLK 280
AC on or off????
Old 09-21-2007 | 06:37 PM
  #360  
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From: Maryland
2019 CLS 53 AMG
I average 32.7 on the highway with A/C on and average speed of 80mph
Old 09-21-2007 | 06:38 PM
  #361  
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From: SoCal
C55, w211 E55, ML320 CDI
Impressive. You have 110,000 miles on an 05? I thought I had alot.
Old 09-21-2007 | 06:45 PM
  #362  
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From: OC
a quarter mile at a time
I can't see the pic from work but checkout my thread a while back!

https://mbworld.org/forums/showthrea...ighlight=prius
Old 09-21-2007 | 06:55 PM
  #363  
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From: SoCal, Irvine
Stage 2 C7 A6, QX60
wow
i can't barely get around 28 on highway
Old 09-21-2007 | 07:23 PM
  #364  
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From: Sarasota, FL
2007 C350 6M
mine is a 3.5L (C350) a 6 spd but only has 1500 miles. On my way from Ohio to Florida I averaged about 32mpg. I am hoping it will get better. I think the sticker showed 21/30 so i am actually above the EPA guess...

Great mileage though!
Old 09-21-2007 | 07:26 PM
  #365  
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From: SoCal
'13 250 Coupe
WOW!! The most ive seen on mine was 29MPG
Old 09-21-2007 | 07:46 PM
  #366  
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From: Orlando, Fl
My gas sipping C-Class
I'm curious to see what will happen when I get my spark plugs and oil changed next week...I'm 300 miles out from service A.

My wife and I drove to Gatlinburg a couple years ago and I reset the trip at the top and coasted all the way down the hill..It was like 8 miles and I averaged exactly 80 MPG...

You have to admit, these little 1.8's get some great gas mileage when driven conservatively......I honestly get around 28 mpg per typical tank...I do 90 mph most of the way to work....I leave my house in Orlando by 5:20 each morning to head to West Melbourne, so I encounter minimal traffic.

The most miles I got between fill-ups was 499.8 miles.......I had to stop and get gas, as I drove 7 miles with "0 miles till empty" on the dash...Maybe I'll try again for 500 one day.
Old 09-21-2007 | 07:47 PM
  #367  
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From: Orlando, Fl
My gas sipping C-Class
Originally Posted by CyberGypsy
AC on or off????
A/C was most definitely on....Too damn hot and humid to not have A/C

Scott
Old 09-21-2007 | 08:10 PM
  #368  
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From: Ocala fl
2006 SLK 280
I have not taken for a long drive maybe a lauderdale run
Old 09-21-2007 | 08:17 PM
  #369  
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From: Central Florida
R129, XF Sportbrake, SC400
110,000 miles?! I have 92k on my 02 320 and i thought i had high miles. I probably don't live that far away from you. Where were all you FL guys when we had our meet in July?
Old 09-21-2007 | 09:01 PM
  #370  
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From: Ocala fl
2006 SLK 280
Originally Posted by Ryanr317
110,000 miles?! I have 92k on my 02 320 and i thought i had high miles. I probably don't live that far away from you. Where were all you FL guys when we had our meet in July?
I live all my life on galt ocean drive in lauderdale, now in Ocala fl
Old 09-21-2007 | 11:52 PM
  #371  
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From: Orlando, Fl
My gas sipping C-Class
Originally Posted by CyberGypsy
I live all my life on galt ocean drive in lauderdale, now in Ocala fl

Yeah, I've been in Orlando since 1987 and currently reside in Oviedo...I opened a new store in West Melbourne about 15 months ago. That's how I've racked up the miles.
Old 09-21-2007 | 11:55 PM
  #372  
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From: Mid-west
IS300
wow, the best I got was only 32 mpg

Did you use cruise control?

Last edited by Shake; 09-22-2007 at 10:38 AM.
Old 09-22-2007 | 12:24 AM
  #373  
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From: Boston
2003 C240
I tend to get high 20's most of the time on the highway, there are lots of cars and traffic in the Boston area, and also, you have to drive more aggressively to fit in with the rest of the maniacs, lol. On drives about an hour or more like the one you had...I tend to get low 30's. If I remember correctly, one time I was up to about 36mpg driving through the mountains near Mt. Washington in NH.
Old 09-22-2007 | 12:38 AM
  #374  
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From: Toronto, Canada
2019 C300 Wagon; '75 Triumph TR6; previous: 2004 C230 6spd sold after 17 years of driving
The best I got was 6.7L/100km on a return trip of 232km highway only, filled up, got on the highway drove one direction visited the parents, came back filled up same gas station, same pump. I averaged 112km/hr, cruise control, windows closed, no air cond. These numbers were calculated not by the computer (always suspect) but actual amount of gas that went in (i.e. when the pump clicked off)

Although everyone else in the world would understand the specs, I will translate in American:
distance traveled 143.8mi
Mpg (US Gallon) 35.05
Mpg (imperial gallon) 42.2
avg speed 69.44mph

Last edited by Boom vang; 09-22-2007 at 12:53 AM.
Old 09-22-2007 | 10:09 AM
  #375  
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From: Central Florida
R129, XF Sportbrake, SC400
Originally Posted by scottisha
Yeah, I've been in Orlando since 1987 and currently reside in Oviedo...I opened a new store in West Melbourne about 15 months ago. That's how I've racked up the miles.
Yea, i wasn't even born then; i was born just a year later. We've been here since '91. I live in Ocoee now. Next time we have a meet here i hope you guys could attend. There hasn't really been any meets in the past due to the lack of people.


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