combination of city and highway. Every tank recorded.



1999 E300 Turbo Diesel. I like to drive 5 to 7 mph over the limit conditions permitting.

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1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
2006 Mercedes CDI new daily driver! 56,000 miles May 2016 now 85,625 Apr 2018 and Apr 2019 101,000 miles Apr 2020 109,875. March 2024 135,250, Dec 2024 145,000 miles

I haven't driven my 85 300D with AC and automatic for a couple of years, but it had a wonderful 617 turbo in it and I know I never got past 24 mpg with it in any kind of driving. Now I have the same engine in my 240D with four speed and have checked 2 tanks very close and it checks out at 28.5. No AC and good suburban driving, lot of 45 to 60 mph with a number of stop lights. I think it is spot on. Mileage has been checked on both the interstate and with gps and is right on also.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

My 1983 300D with 2.88 rear chunk ( speedo accurate & verified against a GPS) on a local loop between my house and DC office averages 24-26 mpg, open highway averaging 65-75 mph with faster stretches will average 31 mpg (this summer from DC to North Dakota and back)

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I've had 3 roadworthy SDs. My 83 got about 23 to 25, it was the fastest of the 3. The 84 got about 26 to 27. Its still a little early, but so far the 85 has ranged from 28 to 31. The 31 occurred after a couple hundred mile all highway jaunt.

My 1985 380SE Diesel (82 617 turbo engine and trans) with the 2.45 rear end gets 28-29MPG consistantly

My 85 w124 300d non turbo got 44.5 mpg from sf to auburn ca going 80. :-) thatsfilling the tank up tell I could see diesel.

1986 was the first year of the W124.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000

I suspect his car is a Euro model.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

And still a very unlikely number. The trip is 240 miles round trip.

I got 34mpg averaging 80mph in the 87 300d with 5 speed , 2 adults, 2 kids and a trunk load of wheels/tires for half the trip.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

If you got 34 driving 80, forty driving 65 seems doable.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

The NA 606 powered w124 is mid 30s. My 87 has a 5 speed manual, making it more efficient with OD and no slush loss. 44MPG is hard to buy on a trip that would be 1/2 a tank.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I know this is an old thread, but I just got 34 mpg on two fill-ups in my 87 TD which I am happy to report. The driving was virtually all freeway miles through southern CA, no A/C, and I kept my speeds at 65-ish (when possible). For one of those tankfuls, I was stuck in traffic for a while, but I did my best to drive smoothly. When I first bought the car 6 months ago, I got 29 mpg doing the same drives. Since then bought new tires which are low rolling resistance Michelins (Energy Saver A/S). I used the same diesel fuel pumps and tried to refill the tank consistently. Also, I have checked my odometer against highway mile markers. On the old tires, it read quite high (so I corrected for that). On the new tires, my odometer reads just slightly low (so a correction is hardly needed). I also add 12 oz of Diesel Kleen per fill up (and I included that volume in my calcs). I honestly doubt that low rolling resistance tires got me 5 mpg at highway speeds, but I am glad that they seem to have helped.


I probably won't ever achieve this again because 65 mph feels very slow on a day-long drive, but I just wanted to run a little experiment this weekend and share the results.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

After discovering my 1987 300TD Wagon had a dragging caliper, my mpg went from 22ish to 25-27 all around. This with no AC and tried with all sorts if variations of highway only, City only, mixed, etc. I've never hit the 28 mark and I cannot remember the last time I went under 25.

The car has 240,000 miles or so and despite the failing head, it runs quite well.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000

My w126 300sd would get slightly above 30mpg highway. Highest was about 33.5.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

'83 300CD, 94 miles/days commute, 303,600 miles on the clock, normally run 65-68 mph at 7-8psi, 12-13 psi on hills, 195/75/14 Unicure A/S retreads on all 4 corners at 35psi, no a/c, windows down, no cruise control, 90-110 degrees outside, avg 23-24 mpg consistently. For the last month and a half, I've been siphoning fuel from my '87 KW cabover and '85 Cummins F350, but I'll fuel once in awhile at Quiktrip to check my mileage.

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'83 Mercedes 300 CD, auto, 301,000 mi,
'85 Ford F350 crew cab, Cummins, 5spd 426,000 mi
'88 Ford F250 reg cab, 351, auto, 124,000 mi
'07 Honda Civic ex, auto 62,000 mi