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Discussion Starter #1
I was driving 80, 85 and sometimes 90 MPH from Miami Beach to Sarasota. I am using too much fuel or is this about right?
 

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1991 300e
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Well at 90mph, you're at what, 4 or 5k rpm? Air resistance is not linear with the forces it has on the car. Meaning, the faster you go, the more the air is like a wall. I'm not that surprised you got 18mpg at those speeds. 65 or 70 would probably see a significant increase in mileage, due both to revs and air resistance.
 

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'99 S420 116K
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If you were driving that slow on I-75 you must have been on the brakes a lot in the granny lane. Ha, ha, ha...
I live in Sarasota and when I enter that speedway from the pit lanes, I'm often hammering 100+ to get to the go fastest lane. If I fall below 85, I gotta move to the center lane to allow the fast stuff to pass quickly.

20-22 mpg all hiway at 65-70 mph, but once you crack into the 75-90 mph range 18 mpg is probably a good number.

Hammer harder dude!:cool:
 

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Discussion Starter #4
LOL
I'll listen to your advice.
Whereabouts in Sarasota, I'm in Indian Beach/Sapphire Shores.
 

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'99 S420 116K
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You are in the HIGH DOLLAR area of Sarasota. :love:
I'm located in the low rent Palmer Ranch part of town about 15 miles south of you.
Shoot an email to me, [email protected], with your number if you'd you'd like to meet up. I'll let you sit in my W140, ha, ha, ha.
 

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Discussion Starter #6
Ha Ha Ha....moving to Whitfield Estates within the month which is on the north side of the Ringling. I toggle between here and the condo in Miami Beach a lot.
Will do.
 

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300 CE 24V Sportline
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I was driving 80, 85 and sometimes 90 MPH from Miami Beach to Sarasota. I am using too much fuel or is this about right?
That's the sort of speed I do for much of the 450 Kms between Paris and my home. My 300CE-24 returns 30+ mpg. Or about 25+ miles per US gallon.

Your consumption seems high.

RayH
 

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1995 E320
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That's the sort of speed I do for much of the 450 Kms between Paris and my home. My 300CE-24 returns 30+ mpg. Or about 25+ miles per US gallon.

Your consumption seems high.

RayH
If I recall correctly, your CE has a 5 speed transmission. An overdrive makes a difference.
 

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I was driving 80, 85 and sometimes 90 MPH from Miami Beach to Sarasota. I am using too much fuel or is this about right?
Doesn't seem out of the ordinary. I've seen low teens at those same speeds, but I was mercilessly hammering my 2.6 through the Colorado mountains.
 

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W124
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Between Sarasota and Miami? How much of that drive was the AC off for? At that speed, pushing a 124 through the air with K-jet with the AC on is 18mpg at best. If you were running under 60mph you might get 22 but that is a big "might". The best mileage I ever got out of a gasser W124 was my 500e running from Savannah home to NY. Got 26MPG running an average of 60mph.
 

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Discussion Starter #13
Between Sarasota and Miami? How much of that drive was the AC off for? At that speed, pushing a 124 through the air with K-jet with the AC on is 18mpg at best. If you were running under 60mph you might get 22 but that is a big "might". The best mileage I ever got out of a gasser W124 was my 500e running from Savannah home to NY. Got 26MPG running an average of 60mph.
Yes, A/C on full blast all the time. After a while I turned down the fan speed.
 

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1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
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That's the sort of speed I do for much of the 450 Kms between Paris and my home. My 300CE-24 returns 30+ mpg. Or about 25+ miles per US gallon.
France has 145km/h speed limits?? thats what 90 US Miles/hour is.
 

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W124
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Yes, A/C on full blast all the time. After a while I turned down the fan speed.
There is your answer. AC is going to cost you 10%. Take off more for excessive speed and heavy, humid, hot, Florida air. A recipe for lousy mileage.
 
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300 CE 24V Sportline
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I thought it was a stick. M104 got the non overdrive 5spd manual.
The 722.5 is a 5 speed auto box based on the 722.3 with an electrically controlled 5th gear at the back. Some call it an overdrive but I'm not sure of the appropriate terminology.

The 722.5 was fitted to M104 engines in a number of guises.

RayH
 

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1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
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afaik, 722.5's were never sold in the USA on W124's.

re: overdrive, what that really means is rather dependent on the final drive ratio. the classic Laycock OD units used on british sports cars in the 60s/70s (and many older Volvos) were actually underdrives, when 'off', they reduced the output shaft speed, when 'on', they were 1:1, this was paired with a taller rear end ratio so the net effect was a taller effective gear ratio. classic manual 4-speed transmissions, the top gear was generally 1:1. later on, this all got soft, and calling something an 'overdrive' is rarely accurate on the technical level, unless you just mean a tall cruising gear for freeway speeds.
 
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