Something is wrong...but what?
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Joined: Jan 2008
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From: Naperville, IL/Chicago
2008 CLK63 Black Series 2012 C63 Black Series 2014 SLS Black Series
Might be a stupid question but did you check for a fuel tank and fuel line for a leak? That is terrible mileage even if you were beating the snot out of it you should get better mpg than that. My fuel mileage goes down when the temp drops (air density) but nothing like what you ate explaining.
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Joined: Oct 2012
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C63 AMG
It is hard to say what the problem could be but a couple of questions that I think that may help are:
1. Is the check engine light on? Maybe get the car scanned for errors.
2. Do you regularly use the aircon?
3. Do you sit in traffic alot?
If the answer to all these is no then there might be a problem with an 02 sensor, spark plugs etc..
I get 300-350km, sometimes more out of a tank but I don't do alot of city driving. I have done trips where I set cruise control for 150+ kms and get 10.5-11L/100km. This morning I took the C for a drive and got stuck in traffic, and the car averaged just over 20L / 100km because I was in traffic.
Hope this helps a little.
1. Is the check engine light on? Maybe get the car scanned for errors.
2. Do you regularly use the aircon?
3. Do you sit in traffic alot?
If the answer to all these is no then there might be a problem with an 02 sensor, spark plugs etc..
I get 300-350km, sometimes more out of a tank but I don't do alot of city driving. I have done trips where I set cruise control for 150+ kms and get 10.5-11L/100km. This morning I took the C for a drive and got stuck in traffic, and the car averaged just over 20L / 100km because I was in traffic.
Hope this helps a little.
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MBWorld Fanatic!
Joined: Oct 2012
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From: Denham Springs,LA
'12 C63 Black Series, '12 ML350 BlueTech
I did 460ish kms on my last tank (288mls). I drive the car daily (26mls) mainly highway in C mode unless i decide to do some spirited driving usually on friday ! lol !
But yeah i noticed idling, city traffic kill the mpg quickly. Having a vacuum leak will reduce it as well.
But yeah i noticed idling, city traffic kill the mpg quickly. Having a vacuum leak will reduce it as well.
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From: Denham Springs,LA
'12 C63 Black Series, '12 ML350 BlueTech
Thanks for all the help.
I guess i should check the gas line for leaks, but again eurocharged found nothing wrong with the car during their inspection.
There is no tune - it is all stock. No check engine light either.
My read out says 27L / 100 KM, which is about 9 MPG. In city driving and no revving / speeding this is much worst than I had expected.
I guess i should check the gas line for leaks, but again eurocharged found nothing wrong with the car during their inspection.
There is no tune - it is all stock. No check engine light either.
My read out says 27L / 100 KM, which is about 9 MPG. In city driving and no revving / speeding this is much worst than I had expected.
Thread Starter
Member
Joined: Jan 2014
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From: Toronto York-R, Canada
E92 335i / C63 AMG / GSX-R 600
I am in Toronto Canada.. It's been around -20C this week.
I did reset at full tank, end of tank was 27L, I also check the after start read out and it is slightly less, 22-23L/100KM
Most of my drive has been in the city with a bit of highway, not much traffic. I will try to see how it does on a highway stretch.
I did reset at full tank, end of tank was 27L, I also check the after start read out and it is slightly less, 22-23L/100KM
Most of my drive has been in the city with a bit of highway, not much traffic. I will try to see how it does on a highway stretch.
plugs were changed?
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From: queensland australia
2009 C 63
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From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
MBWorld Fanatic!
Joined: May 2010
Posts: 7,860
Likes: 39
From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
Is this bad? I've been using Ultra 94 religiously since the day I bought my car cuz this is the highest octane we can get in Canada. LOL
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
With 94 octane you potentially get a little more performance and with the alcohol lose a little gas mileage. Fair trade off? Depends on how well the 94 burns in our cars and if it reduces knock vs 91 Shell then you will get a slight performance improvement. Not sure what performance you will get in reality.
Our cars can use fuel with up to 10% ethanol so you should be fine using Ultra 94 with no harm to your engine or fuel delivery system.
Our cars can use fuel with up to 10% ethanol so you should be fine using Ultra 94 with no harm to your engine or fuel delivery system.
Last edited by Mort; Jan 28, 2014 at 11:38 AM.
Senior Member
Joined: Jan 2014
Posts: 313
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From: Milwaukee, WI
2014 VW Touareg, 2012 C63
This would be my first suspect. Also, your tire pressure can affect your mileage as well. A combination of the current temps, bad plugs and low PSI could contribute to you're low numbers.
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From: Kitchener, ON
2010 C63 AMG
http://retail.petro-canada.ca/en/ind...ee%20gasoline?
Originally Posted by Petro Canada
Does Ultra 94 contain ethanol? Does Petro-Canada still offer an ethanol-free gasoline?
Ultra 94 contains ethanol. Due to the fact that various fuel grades are blended at the point of sale, most grades of Petro-Canada fuel may now contain up to 10% ethanol. This represents a change from the previous state, where premium fuel was ethanol-free at Petro-Canada.
Ultra 94 contains ethanol. Due to the fact that various fuel grades are blended at the point of sale, most grades of Petro-Canada fuel may now contain up to 10% ethanol. This represents a change from the previous state, where premium fuel was ethanol-free at Petro-Canada.
http://pure-gas.org/index.jsp?stateprov=ON
