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1994 Mercedes S500 Limo
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86 Posts
Discussion Starter #1
My S500 is killing me financially, not for repairs or anything as its doing well, but my god the fuel is a nightmare, im getting 240 miles from a tank thats costing £95 $185 to fill, this seems to be every 10 days and sometimes 5 times a month £480 $940 a month is a lot to find.

It needs to go but i cant bear to part, i work for a garage and have driven many a possible replacement but nothing feels right, im stuck for what to do.
 

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89 964c4, 69 xke, 74.5 jensen, 02 bmw 325i, 93 600sel, 99 f-350
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130 Posts
dude... just park it and get a cheap daily driver... enjoy the w140 on weekends with your lady...
 

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1997 S 500
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89 Posts
I'm confused

So you're only seeing 240 miles/tank? With a 26.4 gallon tank (100liters) that's ~9 miles per gallon. The worst I've seen in my 97 is ~15mpg with a lot of city driving.
 

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93 500SEL & 99 S500
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1,022 Posts
My 500SEL has been getting around 12 - 13 MPG in stop and go traffic. Sometimes it's as low as 7mpg for some periods!
 

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Current 1992 - 500SEL, W124 - 1989 230E (sold)
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1,387 Posts
ohh yeh :) that is realy dreadful but blame oil companies not your M119 engine. Fortunately for me 500 is my sunday car and i ride my suzuki to work everyday and that gives me around 50+ mpg (depends how much i trash it sometimes even more) so week of fuel to work is around 15 NZD (about 12USD) ....maybe get a nice motorbike for your work and keep 500 as fun car. surely works for me for past 3 years
 

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1994 S420
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501 Posts
I get ~13.5 MPH in my S420 but I pin it a lot because I enjoy the speed as well. When I drive economically I get about 15 or so...1.5 MPG is not worth turtling around in my opinion so I'll settle for 13.5 and have more fun driving.

I fill up 3-4 times per month for like $90 a pop, always right before or at the fuel light, getting like 230-240 miles before each fill up.

EDIT~Highway mileage is consistently above 15 MPG, that was in town, and I gun it on the freeway a lot
 

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1979 240 D, 1993 500 SEL
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199 Posts
I heard Bobby Likis, who has a car talk show on Saturdays, advise that you can get up to twenty percent better mileage in stop and go traffic if you manually shift the automatic-ie from position 1, to 3 and then to drive.Makes sense, since starting from a stop in drive position is not as efficient.

The other way I deal with the gas is to drive my 240d manual shift during the week and the S class on the weekend.You definitely need a daily driver car.
 

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Current 1992 - 500SEL, W124 - 1989 230E (sold)
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1,387 Posts
OR you could get FGSS for around $150 and have your car always start in 1st gear and wont have to replace gear shift linkage etc. in 3 months or so :)
 

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1994 Mercedes S500 Limo
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86 Posts
Discussion Starter #10
So you're only seeing 240 miles/tank? With a 26.4 gallon tank (100liters) that's ~9 miles per gallon. The worst I've seen in my 97 is ~15mpg with a lot of city driving.
its my fault as i live only 2 miles from work so it never gets chance to warm up, plus im always running late so i cane it, (plus it sounds so good and makes people look around) 240 miles is a worse case senario, ive just had 380 miles from a tank doing some long distance coastal runs, and that included a weeks worth of work and backs, so i think i could see maybe 450 on a solid run, like i said maintence costs so far have not been a problem but the fuel has. Im jus glad i dont have to driveit into the center of london.
 

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1996 S320 (Kuro) 1998 S600 (Weiss)
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2,886 Posts
The 320 wasn't a very popular model in Japan (since everyone was loaded in the 90's I guess) so when I was searching for my current W140 it was quite hard to find a decent 320 with more options than a cardboard box - along the way the dealerships attempted to push me for a 500 going on about "the milage isn't that much different to a 320" etc. Pricks - like hell it isn't - I'm glad I stuck to my guns and went with the 320 now that gas prices have gone through the roof here...
 

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current fleet: 1996 s500; 1997 BMW 328ic; 2000 Nissan Frontier; 1966 AC Cobra
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279 Posts
Chances are you are experiencing poor mileage because your fuel is laced with ethanol.

The following companies are lacing all grades with ethanol:

BP
Shell
maybe others

Ethanol has only 70% of the btu's of gasoline which translates into:

less power
poorer mpg
rough idle
starting problems
corrosion of internal steel, aluminum, plastic and rubber parts


Check out the thread on "ethanol is a joke and should be avioded"



Ed in SC
 

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current fleet: 1996 s500; 1997 BMW 328ic; 2000 Nissan Frontier; 1966 AC Cobra
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279 Posts
Ethanol has an ocatane rating greater than gasoline.

In the US they are allowed to blend up to 10% ethanol and still label it gasoline.

This allows the oil companies to downgrade the octane on the 90% and keep the overall ocatane rating the same. So again, you get a poor quality fuel that has all the negative characteristics.

In your 95 octane fuel you can still have 10% ethanol which will cause you problems.


Ed in SC
 

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1996 S500 coupe
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782 Posts
jesus.. that's a lotta $ on fuel

I don't think I have ever gotten less than 19 MPG in my coupe
(19 US MPG is 22.8 British MPG or approx 12.4L/100km .. I have gotten as little as 11.5L/100 in the past with 75% hwy/25% city)
... that's a mix of some hwy, some city

I use Shell 91, and at the pumps, it's clearly labeled that it does not contain Ethanol. Although lesses grades (87 & 89) do contain Ethanol, but it gives me poorer mileage
 

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1979 240 D, 1993 500 SEL
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199 Posts
Miloking, what is FGSS? sounds like you are saying that manually shifting the automatic is not a good idea.If that is true,I don't want to do it and wreck the tranny, would rather just pay the gas bill.
 
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