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  #1  
Old 03-13-2005, 04:05 AM
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W123 MPG's? And, what's the highest MPG Mercedes diesel wagon?

Subject says it all:

What kind of MPG's does the average diesel W123 get?

And...

What is the highest MPG diesel Mercedes wagon?

Thanks...
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  #2  
Old 03-13-2005, 07:14 AM
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My 85 TD gets a consistent 26 MPG mostly highway at 55-65 MPH.
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  #3  
Old 03-13-2005, 07:27 AM
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81 300TD 28 mpg.
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  #4  
Old 03-13-2005, 08:30 AM
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The answer is available in the archives via a search. MPGs of all diesels and under all possible categories have been discussed millions of times before.
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  #5  
Old 03-13-2005, 09:53 AM
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Just like the evilBay ads I get over 35 mpg!!

Not....I get about 25 to 26 mpg on the highway at about 65 mph
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  #6  
Old 03-13-2005, 10:46 AM
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I've owned my 1985 federal emissions wagon since Halloween, and put 6,000 miles on it in that time. There were 148,615 miles showing on the clock as of this morning. The true milage is a bit higher but not more than 155,000.

I've been through all of the maintainence items. Set the valves when I got it (then reset them after another 500 miles), timing chain stretch (measured at a 2mm detent) is less than 1.5 degrees, injector pump timing is within 1 degree of spec. I'm running Shell Rotella-T 15W-40 in the engine (no oil burning) and Mobil 1 synthetic in the tranny. I ran 2 cans of Diesel Purge through it when I got it and replaced the fuel filters. The car has plenty of power (but I have no other MB diesel experience as a reference point), has minimal blow by (will run for > 15 sec with the CCV tube blocked off) and does not blow any smoke. I live in CT at sea level, and we've had a rather cold winter, the car never fails to start. I would say that the car is in excellent mechanical condition.

I've been keeping meticulous maintainence/milage logs. The car has 4 Pirelli P400 touring tires on stock rims (2 new), 28 psi in the front 32 in the rear. My daily commute is 10 miles each way (3 in town, 5 on the highway, 2 more in town). The majority of the time I drive alone, without any cargo, windows up, heater on, AC off.

My average mpg over the last 6,000 miles is 21.62 mpg.

The best single tank milage (all highway, 75-85 mph, ambient temp near freezing) was 23.87 mpg, the worst 20.84 (all local commuting in December).

Generally I don't use fuel additives, just diesel fuel. I was adding Power Service Diesel Kleen (10 oz per tank) all through January, and saw no difference in milage or performance.

EPA ratings in 1985 for this car were 22 mpg city and 25 mpg highway when new.

I'm hoping my numbers improve when the weather gets warmer.
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  #7  
Old 03-18-2005, 10:42 PM
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Quote:
Originally Posted by wsalopek
Subject says it all:

What kind of MPG's does the average diesel W123 get?

And...

What is the highest MPG diesel Mercedes wagon?

Thanks...
If you listen to the people on Ebay its 38+ mpg on a 123....they also see space aliens on weekends...


I got 21 the last time I checked but that was mostly in stop and go driving that tankfull.
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