only 20 mpg?
Junior Member
Joined: Dec 2007
Posts: 63
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From: Toronto, Ontario
C300 Sport 6-spd
I get about 20 mpg (14L/100 km)in the city, depending on traffic conditions. But on long highway trips, I usually average around 38 mpg (7.5L/100 km).
On a recent road trip, I filled up in New Jersey and drove to Toronto without stopping for gas. I was driving on fumes by the time I reached my destination - 31 miles left before empty, according to the computer.
So, with my C300 manual, city mileage is not that great, but highway mileage is impressive.
On a recent road trip, I filled up in New Jersey and drove to Toronto without stopping for gas. I was driving on fumes by the time I reached my destination - 31 miles left before empty, according to the computer.
So, with my C300 manual, city mileage is not that great, but highway mileage is impressive.
Super Member
Joined: May 2010
Posts: 816
Likes: 21
2008 W204
My dads S550 with the 5.5 V8 averages about 20-21 with a mixture of highway and city driving, a good 70-75 mph cruise gets us 28, 20 seems low for a 3.0 V6, are you driving in sport mode or comfort? Comfort may save you some. I guess just focus more on your driving style and try to be as efficient as possible.
Senior Member
Joined: Jun 2010
Posts: 283
Likes: 1
From: Central Florida
2009 C300 Sport, ex 2007 C230 Sport
I get about 20 mpg (14L/100 km)in the city, depending on traffic conditions. But on long highway trips, I usually average around 38 mpg (7.5L/100 km).
On a recent road trip, I filled up in New Jersey and drove to Toronto without stopping for gas. I was driving on fumes by the time I reached my destination - 31 miles left before empty, according to the computer.
So, with my C300 manual, city mileage is not that great, but highway mileage is impressive.
On a recent road trip, I filled up in New Jersey and drove to Toronto without stopping for gas. I was driving on fumes by the time I reached my destination - 31 miles left before empty, according to the computer.
So, with my C300 manual, city mileage is not that great, but highway mileage is impressive.
Thread Starter
Senior Member
Joined: Jun 2010
Posts: 277
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From: Cali
01' c320 (sold) / 03' Ford Focus(sold) :( / 98' C230 / 00' SL500 / 11' C300 Sport RWD w204
My dads S550 with the 5.5 V8 averages about 20-21 with a mixture of highway and city driving, a good 70-75 mph cruise gets us 28, 20 seems low for a 3.0 V6, are you driving in sport mode or comfort? Comfort may save you some. I guess just focus more on your driving style and try to be as efficient as possible.
Super Member
Joined: Apr 2010
Posts: 705
Likes: 55
From: LA LA Land
'08 C300 MM Pano
I have been religiously logging every fuel purchase I've made on for my C300 for the past 16 months or so...
Average MPG: 20.31
This is @ 50/50 City/Highway driving.
I think OP needs to be a little more patient, while you are not likely to see a big change from what you're getting now, I don't think 2 fill-ups and only 600 miles on a new engine is even close to a fair assessment!
Average MPG: 20.31
This is @ 50/50 City/Highway driving.
I think OP needs to be a little more patient, while you are not likely to see a big change from what you're getting now, I don't think 2 fill-ups and only 600 miles on a new engine is even close to a fair assessment!
Super Member
Joined: Apr 2010
Posts: 705
Likes: 55
From: LA LA Land
'08 C300 MM Pano
Heck, that's better than the manufacturer' rating of 18/28...
Cruise control will certainly help with highway mileage... And hence why you're probably getting those 28mpgs on there. Within the city, and at least for me, cruise control would be on but it wouldn't be set.
Cruise control will certainly help with highway mileage... And hence why you're probably getting those 28mpgs on there. Within the city, and at least for me, cruise control would be on but it wouldn't be set.
Junior Member
Joined: Dec 2007
Posts: 63
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From: Toronto, Ontario
C300 Sport 6-spd
My first reaction when I saw 38mpg was a dropped jaw wondering what in the heck I was wrong with my car. Then I compared your L/100 km numbers with Acapulco Bill's chart and 7.5L/100km should be 31.363 mpg and 14L/100km is 16.801 mpg. 31.36mpg sounds plausible, even though I've never hit those numbers.
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Member
Joined: Oct 2010
Posts: 139
Likes: 1
From: Virginia
2010 C350, 2011 BMW 328xi
great mpg in 2010 C350
Just about to turn 20K miles on my 2010 C350. 2 weeks ago went on a 1800 miles round trip road trip. My avergae speed recorded for the entire trip was 75 mph with and average mpg of 30.5. At one point during the trip just on the highway on was between 31 and 32 mpg while maintaining an average of 85 mph--you definitely getting better mpg at those higher sustained speeds.
Last week back to the national capital region traffic averaged 24 mpg on my 70 mile r/t commute. Not bad considering I am not one to go lightly on the gas pedal moving through traffic.
I recall the first few K miles where my mileage was not so good. Seems these MB engines loosen up quite a bit after break-in.
Last week back to the national capital region traffic averaged 24 mpg on my 70 mile r/t commute. Not bad considering I am not one to go lightly on the gas pedal moving through traffic.
I recall the first few K miles where my mileage was not so good. Seems these MB engines loosen up quite a bit after break-in.
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Joined: Mar 2008
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
"you definitely getting better mpg at those higher sustained speeds."
Not in my experience. High speed travel will increase air resistance ( friction) & increase fuel consumption. About 50 mph is more like the optimum.
Not in my experience. High speed travel will increase air resistance ( friction) & increase fuel consumption. About 50 mph is more like the optimum.
Senior Member
Joined: Jun 2010
Posts: 283
Likes: 1
From: Central Florida
2009 C300 Sport, ex 2007 C230 Sport
I wish we could get 38mpg with our cars.. now wouldn't that be something!
Senior Member
Joined: Jun 2010
Posts: 283
Likes: 1
From: Central Florida
2009 C300 Sport, ex 2007 C230 Sport
So last weekend I fill my C300 and get on the highway for a ~40 mile drive to the dealership. Kept an eye on the mileage because I filled up at a Chevron instead of the usual (Shell) per SA's recommendation.
And I notice it keeps going up.. first 27, then 28, then 29, until it hit 30mpg! Never saw it go that high before, so I had to take a picture. I was doing 70-80 mph almost the whole time since I got on the highway. And the range was a whopping 564 miles. I just had to snap some pics and share them here..
I'm going to stick with Chevron for a while to see how things are over an extended period of time. And I know that the 30mpg had less to do with Chevron/Techron and more to do with steady acceleration on a highway and not having to brake and accelerate all the time.
And I notice it keeps going up.. first 27, then 28, then 29, until it hit 30mpg! Never saw it go that high before, so I had to take a picture. I was doing 70-80 mph almost the whole time since I got on the highway. And the range was a whopping 564 miles. I just had to snap some pics and share them here..
I'm going to stick with Chevron for a while to see how things are over an extended period of time. And I know that the 30mpg had less to do with Chevron/Techron and more to do with steady acceleration on a highway and not having to brake and accelerate all the time.
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Joined: Jan 2009
Posts: 5,113
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From: Southwest USA
Another round of ICE
Senior Member
Joined: Jun 2010
Posts: 283
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From: Central Florida
2009 C300 Sport, ex 2007 C230 Sport
I think they changed the consumption bar a little on the 2011 (maybe even as early as 2010) - as I recall, the bar doesn't go as high as 80mpg.
Super Member
Joined: Nov 2008
Posts: 730
Likes: 1
From: CALIFORNIA
2012 E350 RWD
It shows the mileage range but no consumption bar at all. Oh wells, need to pay attention to the road anyways or I'd be looking at the bar the whole time trying to see how high I can get it up to the end. 
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Joined: Sep 2009
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From: Dix Hills, New York
2012 C250 Coupe
The highest I ever got was 31.8 MPG on the trip indicator. It was a 30 minute trip and I left the cruise control on 60mph the entire time.
Is it just me or does MPG consumption appear a bit funny. I can feather the crap out of the throttle and try to get as efficient MPG as possible, but I still can't get anywhere near the cruise control MPG numbers...
Is it just me or does MPG consumption appear a bit funny. I can feather the crap out of the throttle and try to get as efficient MPG as possible, but I still can't get anywhere near the cruise control MPG numbers...
Senior Member
Joined: Jun 2010
Posts: 283
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From: Central Florida
2009 C300 Sport, ex 2007 C230 Sport
My experience is typically the same as yours (jctevere), but when I hit 30.0mpg, I wasn't using cruise control at all.
I've wanted to hit 400 miles on a tank (city/hwy mix), but the closest I got was around 390 before chickening out because I'd been driving on the car/fuel-hose icon for almost 20+ miles. I normally fill up right around 350-370 miles.
I thought this would be tank to hit 400-450 miles, what with the 30mpg ride (by the end of that trip, I was at close to 80 miles, and still doing around 29mpg). Then I had to do the map update with the car running in park for 2 hours..
I've wanted to hit 400 miles on a tank (city/hwy mix), but the closest I got was around 390 before chickening out because I'd been driving on the car/fuel-hose icon for almost 20+ miles. I normally fill up right around 350-370 miles.
I thought this would be tank to hit 400-450 miles, what with the 30mpg ride (by the end of that trip, I was at close to 80 miles, and still doing around 29mpg). Then I had to do the map update with the car running in park for 2 hours..
Member
Joined: Oct 2008
Posts: 200
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From: San Diego, CA
2016 C450 AMG
Just did a check my commute is mostly highway but a lot of DC lights before highway about 28miles with an average speed of 50mph per the from start information i got 25.1MPG that was in C and not using the engine for breaking. (which I normally use) and that was with me driving to see how good i could get it. I will try my commute home with normal driving habits and see how good/bad it is.
