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Old 10-09-2002, 12:50 PM
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Join Date: Dec 2000
Location: Fairfax County, Virginia
Posts: 856
I can't imagine getting 34 MPG in a 300D - normally aspirated or turbocharged - UNLESS, it was at a very steady state 50 MPH ... while anything is possible, for the weight of the car, the RPM required to maintain speed, etc ... not to mention the likelihood of stopping, going up hills, etc ... 30+ is just not likely.

Not trying to start and argument, but my experience and that of many, many others would appear to push back on this data point.

George Stephenson
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg
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Old 10-09-2002, 01:57 PM
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Join Date: Jan 2002
Location: Bella Vista, Arkansas
Posts: 116
My 84 190d 5speed got 40mpg on last tank. Regularly gets 35-38.
but only has 335,000 miles. But I did rering the engine and have the head rebuilt a few months ago. this car runs and drives like a dream. I wouldn't trade it for a new viper.
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Old 10-09-2002, 03:46 PM
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Join Date: Jan 2002
Posts: 18,350
Angst (Eric):
Are you a C-1 paddler?
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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Old 10-09-2002, 10:31 PM
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Join Date: Aug 2001
Location: Milford, DE
Posts: 1,514
W124 300D's with the 2.5 turbo engine typically return 30-35 MPG.

I've never been able to get less that about 31 MPG city, typically get 35-36 MPG on the highway and have gotten as high as 39 MPG with a tailwind on the highway.

I also had an 86 201 Diesel with a 5 speed that would routinely return low 40's on the highway.

Keep in mind I live in a flat state - no hills whatsoever. Your results may vary.

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Old 10-14-2002, 09:51 PM
unkl300d's Avatar
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Join Date: Jul 1999
Location: San Francisco, Ca
Posts: 2,404
Unhappy Verdict

Well folks, I suspected right. It must have been backpressure because my current MPG calculation after the artefact one, came up short at 14.2 MPG. So that means the tank did not fill up even though all things made it seem so. This has never happened

Normally I average about 19MPG in city and up to 25MPG
all freeway.

1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
1979 240D 140Kmiles (bought for parents) *SOLD.
1989 300SE 148 K miles *SOLD
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Old 10-14-2002, 10:33 PM
84300DT's Avatar
Senior Member
Join Date: Jan 2002
Location: Mass.
Posts: 2,219
did a highway run this past weekend

232 miles all highway average 70+ mph (with some bursts up to
90-95mph )
result consumed 8.3 gal = 27.95 mpg

1984 300D Turbo - 231k....totalled 11/30/07 RIP
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