I have been checking the mpg on my 300SD and it has dropped from 26~27 mpg inthe summer and fall to around 20.5 now! The only difference is fuel. I am making the same commute, traffic is about the same, my speed is the same (70~75)

Has anybody else experienced this type of drop?

With the price of diesel 30 cents higher than gas, I might have to park my baby and go back to my other German car (1984 BMW 528e) It gets around 24mpg. Of course I would rather be in my big comfortable Benz as my commute is 2 hours each way!

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"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Current
Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
Gone
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf ‘86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad

same thing here mine has lost 3-4 mpg sigh

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commercial fisherman diesel in my blood in my boats trucks and Dear old Dad has had me drivin them since i got my first license in 1968
1986 300 SDL 427654
1999 Chevy Crew Cab Dually 225423
1986 300 SDL 287000 Dad's
1987 190 Turbo 158000 Mom's (my inheritance)

I don't go through a tank fast enough and do too much varied driving (from all stop and go to all highway and everything in between) to give you any solid numbers.

Did it seem to coincide with the ULSD?

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)

Yep. That is when my mileage started dropping.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Yep, I'm glad I have a 300d, not the sd or sdl. I just tested my mileage, around town roughly 30 mpg . On the highway, I'll get 36, maybe 35 with a/c on. With a/c on in the blazing hot southern summer, I get 26 city.
jeff 1991 300d, 102k

Same here. I'm getting about 19-20 mpg. Doesn't the price per gallon of diesel go up in the winter? Spring is coming...

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1983 MB 300SD Turbo Diesel

In reality both of our cars are 250DT's. That's what they're called in Europe. I think MB was banking on the reputation of the 300D name when they named it the 300D 2.5T in the US. Love the car though, as much power as a 123 300DT, and about 5-7 more MPG.

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Dale

http://i52.photobucket.com/albums/g1...MG_2277sig.jpg

1990 300D 2.5 Turbo -155k
2000 E430 - 103k
2014 Jeep Grand Cherokee Ecodiesel 4x4 - 11k
2014 VW Passat TDI SE - 7k Bro's Diesel
2006 E320 CDI - 128k Pop's Benz

Pre-glow - A moment of silence in honor of Rudolph Diesel

Yup, it's tied to the price of home heating oil.

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)

I'm losing milage, and its starting to really piss me off.

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1989 300E 144K

I have been adding cetane boost and 2cycle oil to my fuel and have not seen this drop. I have also been doing a 1300 mi RT run every 2-3 weeks with it and consumption has not changed on this trip either. Does it maybe have something to do with the climate your in?

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project

Its called winter diesel. They thin it so it doesn't gel up when it gets cold. It has a lower btu energy content than summer diesel.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

ive noticed only a very small drop in the SD, nothing to get pissed about though, i plan on doing some wvo this summer and cutting it with diesel, just to save a few bucks and have some fun, also putting on a straight pipe and a boost controller and guage... cant wait for this summer/warm weather.

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82' 300SD

I average anywhere from 22-25mpg driving 65 mph about 50 miles round trip. I shoot the breeze with the truck drivers that deliver fuel to the store where I work and they say we never get blends with #1 here, its always straight #2. I sign the receipt for the fuel a lot of the time and I can verify that. In the dead of winter, it usually gets into the teens with a dip into single digits once or twice a winter so gelling isn't that big of a deal.

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Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo

I record every gal of fuel - with odometer reading. It can vary from tank to tank for obvious reasons, but I'm definitely at least 5 MPG down from Dec thru March for each of the last 5 years.

yeh, winter diesel is cut with kerosene which as someone said earlier has less BTUs than diesel.........but gels at a lower temperature than diesel.....

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alimony