Mileage Claims
Well, I just completed a trip from Ontario, Canada to SC - about 1000 miles. We drove at the most 10% over posted speed limit on I-81 (55-70). GLK250 was full, but not heavy stuff and there was just the two of us. We has Thule box on top, but fuel consumption was about same as for same trip last year without box. 27-28 mpg on car computer and by calculation. Car has done about 7800 miles.
During summer, our mileage was at best 35mpg.
So how do others get 40+ mpg with same vehicle? I can't see any way of achieving that regardless of how we drive. Our V-6 E320 gasser did just as well.
Some question the way we drive. On a trip like the one described in post #1, it is hard to imagine many driving more conservatively. We have GLK on cruise control and maintain speed of other traffic, which is usually about 10% over the posted speed limit. The section from Canadian border South to Virginia is quite hilly. We did see an improvement in mileage once through that, but still we couldn't get better than about 29 mpg.
On trips from our home in Kingston to Toronto Ontario, we achieved 35 mpg at about 120km/hr or 74mph. But that is in summer with no roof box or bikes on hitch mount. Also less load by about 200 lbs.
I still just can't see how those higher figures could be achieved on my car. There must be a difference in settings or in the energy content of the fuel.
With the higher cost of diesel vs reg gas, a Subaru Outback or similar gasser might have better economy.
# Date Miles Gallons MPG Price Note
21 1/16/15 518.70 15.49 33.48 3.099
20 1/4/15 512.70 15.48 33.12 3.190
One of the trips had stop and go traffic all the way up to Tahoe, but both trips were fairly free flowing traffic on the way back. They both include all street driving in and around Tahoe for three days each and an average of two "pitstops" for food and restroom breaks each way. The trip computer Usually reports a little higher than the actual calculated numbers on Fuelly.
I have tried driving very conservatively on several trips and can't for the life of me see how I could ever get 40mpg or more as some have posted. Maybe only if it was downhill all the way


In virtually all 'local' conditions, which includes limited freeway, lots of curvy mountain roads and relatively short 'trips', I get 32 mph. Highway at speeds under 90 mph I consistently get just under 36 mpg.
END of JANUARY 2015 @ 46K MILES.
I'm new to the forum and never owned a Benz before. I'm buying a used GLK for 21,500 USD. it is approximately @46,000 miles, the last time it was serviced was @43,000 (according to the previous owner). this is my first Benz, I'm looking forward it lasting me a while and ill do my best to maintain this car. any tips advises? i drive to work every day, i drive about 4,000 miles a month. I'm thinking about doing oil changes every 15,000 miles. I will also be using Mobil 5W-40 FORMULA M. what do you guys think? any tips on getting it to last longer? my goal is to have the highest mileage GLK. ill update my my mileage and how much i spend on the car. stay tune guys and ill be looking forward to your guys responses.
MIDDLE of FEBRUARY 2015 @48K MILES.
I yelped the best reviewed Mercedes Benz Repair around my area atm and decides to take it to Powerhouse German Automotive[15195 Moran St Westminster, CA 92683] for Service A and buff out someone keyed my baby after some public appearances. (some jealous person... probably drives a ford or something). This is the first time I brought it to the mechanic under my possession even though I should've got it checked out before I purchased it off of craiglist.. haha I'm ashamed I'm also currently doing a Techron Fuel System Cleaner treatment, I wanted REDLINE S1 but couldn't find it in store, I'm going to order that on amazon along with a lot of other products that I'm bringing to [http://f3autodetailing.com/] @60K MILES, my friend works here.
@60K MILEAGE SERVICE
THE FIVE FLUIDS.
- ENGINE OIL CHANGE.
- TRANSMISSION FLUID FLUSH.
- COOLANT FLUSH.
- BRAKE FLUID FLUSH.
- POWER STEERING FLUID TOPPED OFF.
I'll be selecting my own products to use on my benz on this service, I read a lot of good things about Royal Purple and decides to use most of their products for my fluids. The following products is what I'll be using on my benz until I find something better I suppose. Any comments about them ?
- Royal Purple 05540 SAE 5W-40 RP Series Oil - 5 Gallon Pail
- Royal Purple MAX ATF Synthetic Transmission Fluid Oil 12 Qt. 01320
- Mann Filter (CUK 29 005) Carbon Activated Cabin Air Filter
- Royal Purple 01326 Max EZ High Performance Synthetic Power Steering Fluid - 12 oz.
- Mann-Filter HU 718/5 X Metal-Free Oil Filter
- TYC 800129C2 Mercedes Benz Replacement Cabin Air Filter
- OES Genuine Coolant/Antifreeze 1 Gallon
- Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.
- Pentosin (BF-DOT4-1000ML) Brake Fluid - 1 Liter x 2
- Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce
- Rain - X Latitude WIPERs
- Wagner ThermoQuiet MX1341A Semi-Metallic Disc Pad Set, Rear
- Wagner ThermoQuiet MX1406 Semi-Metallic Disc Pad Set, Front
- Hengst Fleece Oil Filter Kit
Did you guys ever heard of the mileage award they have with Mercedes?
http://www.mbusa.com/mercedes/herita...ghmileageaward
WHAT'S YOUR GLK MILEAGE?
WHO HAS THE GLK WITH THE MOST MILEAGE at the moment?
STAY TUNE AND SUPPORT MY PROGRESS!
https://mbworld.org/forums/glk-class...e-project.html
The Best of Mercedes & AMG



