2005 c230K - 22 city, 30 hwy
1982 300td - 21 city, 25 hwy

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1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)

'86 420SEL 17-18 mpg highway.

Back when I was running stock compression at 9psi I got 21mpg all around. I lowered the compression and upped the boost and now I'm down to 14mpg .

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1997 Mercedes E320 Turbo
Garrett T3/60-1 Turbocharger
Custom Water Intercooler Setup
352rwhp/366rwtq @ 8.6psi in '08

http://img78.imageshack.us/img78/1051/log7smallay9.jpghttp://img66.imageshack.us/img66/740...s3smallox0.jpg

'85 380se. get's 19mpg and driving it like there's a brick under the pedal. 50/50 hwy/cty.

'79 280e. get's 14mpg all city miles with the gas pedal down to the floor. its also got a wierd fuel overpressure issue on a full tank so it drops about a quart of gas after fillup.

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- - - '77 federal 280e - 222k miles
- - - '85 380se - 129k miles
- - - '07 Chevy truck
- - - '79 Datsun 280zx with '82 turbo motor
- - - Currently looking for a clean 190e with less than 160k miles.

Hey, that's a good question. Doing 65 - 70 mph I get 16mpg. That can't be right can it? We're talking six cylinder here...three speed automatic.
Which brings up another question. If the plugs are burning clean, timing right, clean air filter. Where can I get information on adjustments to the carburetor--air/fuel mix?

87 300DT

When i drive mostly highway miles (more than 90%) at around 70 mph, i get 27.5 to 28.0 mpg

When mixed driving, about 24 to 25 mpg

This is interesting - I switched to PURE gas, which has no ethanol in it. Running 93 octane gas, after two fill-ups with the PURE gas, my mileage has gone DOWN from 17.5 to 16.2.


Less mileage with NO ETHANOL??? How did that happen?


-tp




"'90 300SE gets 17.5 in mostly city driving, with a lead footed driving style. I also keep it in 3rd sometimes in town to keep the motor in the power band and to make deceleration without brakes possible. That's using 93 octane gas with 10% ethanol. I feel reasonably certain that I would be getting over 20 if I drove grandma style.

I just found a station that sells PURE gas (the brand and the description) no ethanol!

It'll be interesting to see if my mileage improves noticeably."

'81 300SD 20 mpg in town and about 24-25 on the highway at 70mph.

All I can say is wow.....

I drove my 300SE to NC and back, doing 75-85 MPH the whole way. I was stunned to see that my mileage averaged 23.7!!

So, I get 17.5 around town, but on the highway it's considerably higher even at high speeds. I think it is pretty astonishing that a 2 ton car with an inline 6 motor screaming at 4000 RPM the whole time can come anywhere close to 23.7 MPG.

Oddly, I still have soot in my tailpipe so obviously my mileage could be better (at least in town).

I'm amazed.....

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition

It seems a properly running M103 can get pretty decent mileage. I've finally got mine running excellent, and it has been getting about 22.5-23mpg average with a mix 50/50 of city/freeway.

My 300SD has notched up a bit to 24 or so.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

On my last tank of fuel, I calculated about 22 MPG in my 1998 C230 NA. That's a mix of city and hwy, mostly city. I expected a bit more than that, but then it's been having a misfire problem, that comes and goes, and the CEL has illuminated randonly a few times. :\

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles

I get about 15-17 MPG on my 79 280CE.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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my 1992 190E 2.6 gets 26mpg highway 20 mpg town. my 2001 E430 with V8 gets 27 mpg highway and does poorly in town. The highway mileage is excellent because I drive 80 mph using the cruise control

I get much better mileage than I should in my 1994 E320 Sedan. Speedometer error. BUT, 31.5 mpg highway on a trip from Boston to Bangor, at 55-60 mph, with roughly 10%error, judged by police roadside speed advisors vs. speedometer reading, and using summer gas. Mileage gets considerably lower on winter gas.

Have hit 500 miles on a tank (18.5 USG). That would be 27 mpg, with no error factor. 50/50 mix usually 25 mpg winter, 27 mpg summer, but factor that 10% in again.

Still, not bad at all, and much better than I had expected. I'm easy on the pedal though.

Still getting 20.1 mpg (occasionally 21 mpg) in town on my '88 300SEL, with 156K miles.... around 27 mpg on the freeway.

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2004 Toyota Sequoia Limited 4wd
1991 Lincoln Town Car Executive
1991 Cadillac Sedan DeVille
1988 Mercedes 300SEL
1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon
1973 Pontiac Grand Ville
(Prior MB's: 1974 240D, 1985 380SE, 1984 190D, 1993 400SEL)