I was able to get what amounts to over 500 miles on a tank when I bought the car. I adjusted the valves, and my mileage dropped, and probably took a few thousand miles to get back to where it was when the valves were too tight.

I am getting 33 MPG on the highway now if I keep my speed between 55-65. Around town, which means taking a 1 mile trip here and there, I can be as low as 24 MPG. Generally, I get 400 per tank around town and well over 500 on the road.

Of course good valve adjustment affects the mileage, but I am inclined to believe that an engine that has not lost any compression will be more important when it comes to good mileage.

I love these cars. My current one is a 1993 6 cyl W124 300D. Brought directly from Germany to New Zealand and I am the second owner. Never old in the US. Non turbo.
I have run 100% biodiesel for the last 2 + years totally unaltered. No modifications whatsoever. I change the fuel filter every 10,000 kms and that is all in nearly 200,000kms. My mileage is simply amazing. The gearing is different in this vehicle designed for long haul. Factory. My best long haul is just under 47mpg and around town approx 32 mpg. No repairs just filters and fluids.

High MPG - 31.4
Low MPG - 27.0
Average - 29.1

I keep up with the mileage with the app GAS CUBBY.

146k miles 100% new suspension. This is consistent with my previous 1995 E300D that I personally put over 350K on.

I have owned 3 W123's and they all were in the 23 MPG range. I'm a salesman in eastern SC (flat and at sea level).

On my 116 I usually average 23-25mpg
It has 220k miles and I baby it. Best mpg to date was 29. Highway driving, overinflated tires, ac not running.

Hi My 1987 300D Turbo got about 28 MPG on highway
My 1985 300 CD Turbo got about 27 MPG highway and city
My 2005 E320 CDI has gotten over 42 MPG on the highway ( I got pictues to prove this)
I drive for milage people behind me hate it.

the 617 in my 1961 chevy c10 gets about 19mpg on used vegetable oil.
VEG 2.0

my 300d with 166k gets around 27-29 gallons/mile

I used to get just over 750km out of a tank full. 78 300D sedan. Obviously a lot less than the 12.5 L/100Km as stated in the handbook. That was babying it a bit but still doing 100Kph down the highway etc. Unfortunately I don't know what miles or gallons is.....

My 2 newer Diesels, VW Jetta TDi and Peugeot 307 HDi get 4.9 and 6 L/100Km. Peugeot has a real automatic with torque converter but I will try it on a 300km trip soon to see if I can get it down to the claimed lower consumption level.

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Stroked 2L-TE powered S123. Now there's a thought.
'lieber tot als schwung verlieren'
Ölpreis-Schock: Diesel-Fahrer haben keinen Kostenvorteil mehr

MAN 26.463 DFLS Tipper truck and Dog--Daily driver.... Traded in
Toyota LJ78--Wifes car.... Traded in
MB 300TD--My baby.... still alive
Toyota HJ60 Sahara--unfinished project.... scrapped
MB 300D x2--Spare parts
WV Jetta 2.0L TDi Pumpe Düse
Peugeot 307 Touring 2.0L HDi common rail
Now working at Weatherford

My E300D (with 200,000 miles on the clock) runs about 10 litres/100km generally around town and local running, 8.0 on a good motorway run at the speed limit here in France, 130km/hr.
I guess that's about 28mpg UK / 24 USA and 35mpg UK / 30 US.

Paul

I get around 25 under normal conditions, can make 28-29 if I really try.

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1982 300CD Petrol/Black Leather

1986 300 SDL
300K
Auto, of course
25 to 27 mpg

At 315K in Santa Cruz, CA my wonderful 240D was pulling 22-25mpg around town and 28-33 highway. When I added 1 part clean canola oil to each 4 parts diesel into the fuel tank, mileage went down a tiny bit, and behind me smelled like a heavenly Hawaiian barbeque, 'cause that's where the oil was from. Ran clean, a little less power on steep hills...needed the tank cleaned out after about 20,000 miles, tho...
Car was totalled in 2008 when a teen pulled out right in front of me...but engine was still running w/radiator wrapped around front of engine. What a beast!

All my Diesel 'Benzs get about the same average as everyone else. The 300D-T's & CD-T's get 24-28 MPG, 190D- 28-32 MPG, 1995 E300D- 28-31, 1999 E300TD- 21 worst, 31 best, average 26 MPG. The 240 gets around 28, but will get up to 30ish on the highway. All these figures are on 80/20 WVO/RUG blend, YMMV......Rich

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All Diesel Fleet
1985 R107 300SLD TURBODIESEL
2005 E320 CDI (daily)

LOTS of parts for sale!


EGR block kit
http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html

1985 CA emissions 617 owners- You Need This!
Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst.

Sanden Instalation Guide (post 11):
http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html

Lmao!!!! That's funny!!!
Lambert took it!

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2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold

Had a 1987 190D with 2.5 Turbo engine. It got about 32 highway, 25 city with air and auto. Later bought a 1998 E300 Turbo Diesel and got as high as 37 MPG on the highway, around 28 city driving. Now have a 2005 E320 CDI. This vehicle is great! LAst summer we left from middle of Virginia and drove toward New Jersey in traffic for 281 miles, and got and honest to God 48.0 MPG! This car usually averages around 30-31 city and if I drive on a trip and get less than 39 MPG I am doing something wrong!