The 2.6 engine is really not noted for its economy. My 1988 260E 160,000
miles) does around 21/22mpg round town and up to 30mpg on the motorway
(freeway), but of course the UK Gallon is bigger than the US Gallon, if
that's where you are from. My 500SE does around 16mpg in town and 23-25mpg
on the motorway, and the engine is nearly twice as big as the 260E!
I would say your car may be using a little too much fuel BUT then again I
don't know how you drive it! I am an elderly gentleman who drives sedately.
Remember the thing that uses the most fuel is acceleration and sitting in
queues, not moving.
Of course your car may also have a catalytic converter fitted, which may
make it use a little more fuel. Mine does not have a CAT, so maybe I am
trying to compare things which are not at all the same.
Otherwise, try getting it tuned, including replacement of the air filter if
it shows signs of soiling and new spark plugs. The mixture should be checked
as well. Make sure the tyre pressures are not low as well.
All the best,
Al Bolton, G4VSQ
1990 Mercedes 500SE 130,000 miles
1988 Mercedes 260E 160,000 miles
I agree with Mr. Bolton. Maintenance is important, and driving style
definitely affects mileage. If you are in stop and go driving,
mileage is worse. Especially if you like to accelerate rapidly.
Also, gasoline quality, and cleaning agents and/or ethynol contained
therein is important. When our city was requiring certain detergents
and agents, my mileage went from 18 mpg city to 14 mpg city.
Your city mileage seems decent but your highway mileage of 23 mpg
seems WAY too low. Unless you are driving at 85mph+ I think you
should be getting at least 30 mpg on the highway. I believe that is a
2.6 litre in-line six you have. Mileage should be better I think.
The original window sticker for my 1991 US 190E 2.6 shows:
City MPG = 19
Highway MPG = 24
Actual Mileage will vary with
options, driving conditions,
driving habits and vehicle's
condition. Results reported to
EPA indicated that the majority
of vehicles with these estimates
will achieve between
16 and 22 mpg in the city,
20 and 28 mpg on the
1991 190E 2.6 Liter
6-cyl Engine Fuel Inj
Auto 4 SPD Trans
Rear-Wheel Dr Catalyst
Feedback Fuel System
Estimated Annual Fuel Cost:
I'd say that your mpg is quite normal.
beside excellent maintainence,
little tweeks such as using synthetic oils
and check that tires at proper maximum recommended pressures
(I overinflated by 10% in winter and 5%the rest of the year)
may add a few mpg.
Personally I learned a trick a few years ago,
in stop and go traffic I don't touch the gas
rather I used the brake pedal only, letting the engine remain
In my daily commute during the winter (Chicago)
I would start the car, wait for oil pressure to get up,
but rather than wait for a complete warm up.
I would start to travelly slowly down sidestreets until the car warmed up
(faster than waiting to warm while idling).
When not running late I am a feather foot (not slow mind you),
I keepup wiht traffic but coast when possible. I anticipate braking far in
advance by keeping
an eyen on traffic ahead. A simple thing like not tailgatine in stop n go
makes a bit of differnece
in a cumalitiave way.
I found altogether this bumped my winter average up 4-5 mpg on a car that
was epa rate for 24mpg I was
getting almost 30mpg.
P.S. My commute distance is 40miles (expressway) plus one mile of streets at
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