So, what gas mileage (MPG) are you getting?
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Joined: Jul 2015
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2015 GLA 250, 2005 C240
MBWorld Fanatic!
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From: Melbourne, Australia
2016 GLC 250d AMG pack, 2017 GLC Coupe 250d AMG pack , 2002 BMW 330Ci convertible, 2021 BMX X1 sD20i
Agree.however I like the chase sometimes.... Bit like trying to get the Lottery numbers !
That said, still happy with the ave l/100 result.
Impressed that car doing about 1400rpm at 110kph, sad thing is I did not check which gear it was in, I assumed it was 9th. I was surprised to see it in lower gears at times, handled ok, all good, just thought it would default to highest gear quickly. I had selection on Comfort. A couple of times I gave it a squirt with setting on Sport +, very nice.
That said, still happy with the ave l/100 result.
Impressed that car doing about 1400rpm at 110kph, sad thing is I did not check which gear it was in, I assumed it was 9th. I was surprised to see it in lower gears at times, handled ok, all good, just thought it would default to highest gear quickly. I had selection on Comfort. A couple of times I gave it a squirt with setting on Sport +, very nice.
Last edited by Teckno; Apr 26, 2016 at 06:01 PM. Reason: Not finished
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GLC 300
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From: Virginia
2016 GLC300 4Matic
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Joined: Mar 2016
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GLC 300
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Joined: Sep 2005
Posts: 251
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From: Melbourne, Australia
GLE 350D GLC 250D, Previous vehicles W204, W164, W163, W210 & W202
GLC 250d averaging 6.2 litres per 100 km (37.9 US MPG) predominantly suburban driving.
Highway driving is 5.8 l per 100 km (40.5 US MPG)
Car has done 5000 km and economy has improved over that time.
Highway driving is 5.8 l per 100 km (40.5 US MPG)
Car has done 5000 km and economy has improved over that time.
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Junior Member
Joined: Dec 2008
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volkswagen Jetta TDI
For my GLC300 with 2.0 engine, it is doing about 25mpg combined. Today I took it on my long commute, with 55miles it average 35.1mpg according to computer.
If computer is accurate then it's quite impressive. My normal commute car is a VW jetta tdi and it is able to do in the high 40s, but it weighs much less (3300 vs 4000 lbs), and has a much smaller size.
If computer is accurate then it's quite impressive. My normal commute car is a VW jetta tdi and it is able to do in the high 40s, but it weighs much less (3300 vs 4000 lbs), and has a much smaller size.
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Joined: Mar 2016
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From: Melbourne, Australia
2016 GLC 250d AMG pack, 2017 GLC Coupe 250d AMG pack , 2002 BMW 330Ci convertible, 2021 BMX X1 sD20i
From Oz, Down Under.
GLC 250d, 6000km on clock. Freeway and small towns.
6.2liter per 100km, ave 99kph for 180 km run. Door to door.
US = 39 mpg.
U.K. = 45.5 mpg.
Very happy, on cruise control the whole time.
GLC 250d, 6000km on clock. Freeway and small towns.
6.2liter per 100km, ave 99kph for 180 km run. Door to door.
US = 39 mpg.
U.K. = 45.5 mpg.
Very happy, on cruise control the whole time.
Last edited by Teckno; May 21, 2016 at 08:48 AM. Reason: Update
Newbie
Joined: Jan 2016
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2016 GLC300 4-Matic
I filled up yesterday morning using 91 octane NO ETHANOL fuel and was able to obtain 29.7 mpg for 220 mile trip. I wasn't driving very conservatively (about 80) and was thoroughly surprised with my fuel consumption! Perhaps Ethanol free fuel is the trick to obtaining better than advertised fuel consumption.
Super Member
Joined: Dec 2015
Posts: 812
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From: Springboro, OH
16 GLC 19 Volvo XC40 06Corvette Z06
Give credit for great mileage to the fact the fuel you were using had no ethanol blended in.
Impossible to find ethanol free fuel in my local except at marinas.
Impossible to find ethanol free fuel in my local except at marinas.
Super Member
Joined: Aug 2015
Posts: 565
Likes: 26
From: Cincinnati OH
2013 BMW X6 - Soon to be GLC300 4M
I road tripped to Atlanta for 5 days weekend and got about 26 MPG overall. Some caveats though:
> We were carrying a fair amount of cargo of luggage and stuff
> It rained and was pretty windy (headwind mostly) on the way down
> Hit some heavy traffic both down and back so there were some stretches of stop/go traffic (the Distronic features came in handy here)
> I was in comfort mode the whole way with AC going the whole time
> The bulk of the trip, we were running ~80MPH
> Did probably 80 mi of driving around Atlanta suburbs.
> I have about 2k mi on the car so it's not fully broken in and reached its most efficient state yet
I think the adaptive cruise control (Distronic whatever) can be less fuel efficient if you aren't vigilant. Normally I would come up on a car and then pass as I get within 304 car lengths. If you have the cruise set, it will begin letting off way before that so then you need to get over and then it will accelerate again. As such, there was a fair amount of unnecessary auto decel/accel going on when I didn't get over early enough.
> We were carrying a fair amount of cargo of luggage and stuff
> It rained and was pretty windy (headwind mostly) on the way down
> Hit some heavy traffic both down and back so there were some stretches of stop/go traffic (the Distronic features came in handy here)
> I was in comfort mode the whole way with AC going the whole time
> The bulk of the trip, we were running ~80MPH
> Did probably 80 mi of driving around Atlanta suburbs.
> I have about 2k mi on the car so it's not fully broken in and reached its most efficient state yet
I think the adaptive cruise control (Distronic whatever) can be less fuel efficient if you aren't vigilant. Normally I would come up on a car and then pass as I get within 304 car lengths. If you have the cruise set, it will begin letting off way before that so then you need to get over and then it will accelerate again. As such, there was a fair amount of unnecessary auto decel/accel going on when I didn't get over early enough.
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Joined: Jun 2016
Posts: 25
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GLC300
GLC300 - 1500 miles to date and 4 fillups. 25 mpg calculated the old fashioned way with a 50/50 mix of city and highway. The computer has had large errors both under and overestimating mpg
This past weekend I noticed on a 70 mile trip (each way) that the hwy mileage really drops when you go above 70. At 80 mph the mileage drops to about 25 mpg vs 30+ at 70 mpg. This is the same as I saw on my Saab 9000 turbo and Volvo V70 T5. Once you are at higher speed and on the boost more the mpg drops.
This past weekend I noticed on a 70 mile trip (each way) that the hwy mileage really drops when you go above 70. At 80 mph the mileage drops to about 25 mpg vs 30+ at 70 mpg. This is the same as I saw on my Saab 9000 turbo and Volvo V70 T5. Once you are at higher speed and on the boost more the mpg drops.
Member
Joined: Mar 2013
Posts: 213
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From: Pennsylvania
2016 GLC300 4Matic
GLC300
This past weekend I noticed on a 70 mile trip (each way) that the hwy mileage really drops when you go above 70. At 80 mph the mileage drops to about 25 mpg vs 30+ at 70 mpg. This is the same as I saw on my Saab 9000 turbo and Volvo V70 T5. Once you are at higher speed and on the boost more the mpg drops.
This past weekend I noticed on a 70 mile trip (each way) that the hwy mileage really drops when you go above 70. At 80 mph the mileage drops to about 25 mpg vs 30+ at 70 mpg. This is the same as I saw on my Saab 9000 turbo and Volvo V70 T5. Once you are at higher speed and on the boost more the mpg drops.
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Joined: May 2016
Posts: 16
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2016 GLC300
Getting 28+ the last two tank fulls with city/highway driving. 1200 miles on the clock. Got around 450 miles per tank full. It looks like breaking 500 miles per tank highway driving will be no problem. I love that!
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Joined: Jun 2016
Posts: 30
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BMW X3 F25
With my petrol cars I put around 400ml ( can of coke) of mentholated spirits in the petrol tank to displace any water from condensation forming in the tank. That way the dissolved water is burnt with the petrol in the engine and you avoid any later contamination.
Additionally I do not let my tank get lower than 75% empty as most modern cars seem to use the fuel in the tank to keep the electric fuel pump in the tank cool ( sort of like a built in radiator).
Finally I regularly use a respected brand name fuel and injector cleaner in the tank, only when I fill the tank to full.
You might have a partly blocked injector and the engine management system might be compensating by loading the other cylinders to provide smooth operation.
Run a tank or two and repeat cleaning process and take it for a 50 mile drive or more to help clean the system.
Your GLC made in Europe ? Then had to be shipped by sea and sit whilst inspected, prepped, etc, so it's likely the tank was empty for 1 to 2 months before being filled for the first time.
Try my suggestion, if still no better I would suggest booking in for computer analysis of engine and transmission behaviour. Possibly auto is not running as effectively or there is an injector blockage, or engine sensor ( multiple sensors to choose) might be defective.
Good luck, let me know how you get on.
Cheers
Additionally I do not let my tank get lower than 75% empty as most modern cars seem to use the fuel in the tank to keep the electric fuel pump in the tank cool ( sort of like a built in radiator).
Finally I regularly use a respected brand name fuel and injector cleaner in the tank, only when I fill the tank to full.
You might have a partly blocked injector and the engine management system might be compensating by loading the other cylinders to provide smooth operation.
Run a tank or two and repeat cleaning process and take it for a 50 mile drive or more to help clean the system.
Your GLC made in Europe ? Then had to be shipped by sea and sit whilst inspected, prepped, etc, so it's likely the tank was empty for 1 to 2 months before being filled for the first time.
Try my suggestion, if still no better I would suggest booking in for computer analysis of engine and transmission behaviour. Possibly auto is not running as effectively or there is an injector blockage, or engine sensor ( multiple sensors to choose) might be defective.
Good luck, let me know how you get on.
Cheers
1.The denaturant in metho is probably OK but these high tech engines are capable of objecting to small quantities of stuff they dont like so I would be a bit concerned about that....maybe..?
2. Adding methanol will excite 07SGT beyond rationality in adjacent EPA thread as he is on a one man quixotic campaign to rid the planet of politicians and methanol...maybe not in that order.
When I got my first diesel Discovery in 1989 the workshop tech told me to put Diesel Power in every tank.The book says not to use any additives. I subsequently blew a head gasket shortly after swimming the Bloomfield River without covering the radiator. When they pulled the head off when the gasket finally blew in Port Lincoln (yes) the guy said he had never seen a cleaner head at 90,000km...so I have disobeyed both Land Rover and BMW (yes...the book says dont use any additives) and always added Diesel Power to every tank and plan to continue with my GLC 250D when it arrives.
You must be as old as me to be adding metho to petrol..LOL
Last edited by mindi; Jun 12, 2016 at 03:25 AM.
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Joined: Mar 2016
Posts: 1,040
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From: Melbourne, Australia
2016 GLC 250d AMG pack, 2017 GLC Coupe 250d AMG pack , 2002 BMW 330Ci convertible, 2021 BMX X1 sD20i
Hi Mindi,
Good chat, yep I'm an old buggier, well if you look at my birth certificate, but after the morning shower I convince myself that the body snatchers tried, but failed, my brain thinks I'm 20 years younger than my outside skin actually is.
Yes the metho bit was from when I read, yes actually read, my manual for my SAAB, 9000 Aero, last edition in 1997. Great car, well before its time. SAAB advised the metho trick for condensation.
With all our cars we use fuel tank cleaners, like Vavoline, Nulon, etc. really clean exhaust pipes at exit.
Originally when heading to the snow with our diesel, we had great difficulty in getting a diesel 'anti freeze' product. Now most auto stores stock it, but you would be surprised how many new diesel drivers who get stuck above the snow line with their diesel turning to gel, in Australia, without the additive or buying diesel on the approach to the mountain, where the service stations have alpine diesel pre mixed at the pump.
We love our GLC.
About to look at another Lexus or GLC. Jag F-Pace over priced for what is offered.
Happy motoring.
Good chat, yep I'm an old buggier, well if you look at my birth certificate, but after the morning shower I convince myself that the body snatchers tried, but failed, my brain thinks I'm 20 years younger than my outside skin actually is.
Yes the metho bit was from when I read, yes actually read, my manual for my SAAB, 9000 Aero, last edition in 1997. Great car, well before its time. SAAB advised the metho trick for condensation.
With all our cars we use fuel tank cleaners, like Vavoline, Nulon, etc. really clean exhaust pipes at exit.
Originally when heading to the snow with our diesel, we had great difficulty in getting a diesel 'anti freeze' product. Now most auto stores stock it, but you would be surprised how many new diesel drivers who get stuck above the snow line with their diesel turning to gel, in Australia, without the additive or buying diesel on the approach to the mountain, where the service stations have alpine diesel pre mixed at the pump.
We love our GLC.
About to look at another Lexus or GLC. Jag F-Pace over priced for what is offered.
Happy motoring.
Newbie
Joined: Jan 2017
Posts: 1
Likes: 0
Mercedes-Benz C-Class
GLC300 - 1500 miles to date and 4 fillups. 25 mpg calculated the old fashioned way with a 50/50 mix of city and highway. The computer has had large errors both under and overestimating mpg
This past weekend I noticed on a 70 mile trip (each way) that the hwy mileage really drops when you go above 70. At 80 mph the mileage drops to about 25 mpg vs 30+ at 70 mpg. This is the same as I saw on my Saab 9000 turbo and Volvo V70 T5. Once you are at higher speed and on the boost more the mpg drops.
This past weekend I noticed on a 70 mile trip (each way) that the hwy mileage really drops when you go above 70. At 80 mph the mileage drops to about 25 mpg vs 30+ at 70 mpg. This is the same as I saw on my Saab 9000 turbo and Volvo V70 T5. Once you are at higher speed and on the boost more the mpg drops.
It is obvious that the instant consumption sometimes looks like incorrect but it isn't.... so simple it is instant.
Many factors affect fuel consumption such as, the engine condition, the driving behaviour, instant acceleration, the tire inflation pressure, weight,
city/highway driving and more....
To calculate with relative certainty the average fuel consumption must:
Travel some tanks.
Full tank - wait to empty and then compare with computer mpg.
You could compare fuel cost for your various car's consumptions (city, highway, combined)
Convert car's mpg to l/100km for more comprehensive view.
And you must remember that fuel consumption doesn't change dramatically from a route to route...
