apl175

Just realized that when I had new Pilot Exaltos fitted at BJs, they over inflated the tires by more than 8 psi past the maximum - and it's been like this since the end of summer.

Explains the mileage I got on a trip from Washington DC to Atlanta just after Labour day...more than 500 miles later.

07 E320 Bluetec

tbone

I'm not familiar with bluetecs...is that mileage good or bad for your car?

edwinwalke

I would say that 37MPG at 65mph over 500 miles is about average. I have done 41+ with a 06 E320 CDI on an interstate trip with one stop over a distance of 260 miles at approximately 65 mph. I run my tires at 29 front and 33 rear which is the recommendation for high speed. That give goed handling and not such a harsh ride that over inflation will give and probably poor tire wear.

aintez

holy crap !! I get about 16mpg around town and about 20-22mpg on the motorway/freeway is that normal for an e500 03 ?

vettdvr

Your driving may cause variance in mpg.

Our 2003 E500 gets combined city/hwy 19.5 and on the highway flat land steady cruise 25.7 mpg.

We owned the car since new and it now has 93,000 these mileage numbers are correct for our car and driving habits.

If you are getting 22 on the hwy you have an issue.

Are you running fuel with alcohol? This can cause a drop of up to 10% in mpg.

Octane might also be an issue we run only 93 octane top tier fuel.

We run our tire pressure on Michelin PS2's at 32 all 4 tires.

Barry45RPM

I've done 30.3 MPG @ 80 MPH on the interstate on a trip from NY to Washington DC, in my E 550 (gasoline) w/ factory spec inflatiion pressures.

Boulder GT3

I'm sure you'll like the ride better with the pressures down. 8lbs will be noticable.

I get 25MPG in stop and go. About 35-38MPG at 80MPH. For reasons not clear to me, my mileage doesn't drop much until I go >80MPH. I had a strech of 100 miles where I averaged 93MPG and I still got 33MPH.

aintez

hmm maybe i should check it out again.
Fuel i use is an alcohol blend from the pump and is 98 octane.
Tyre pressure is actually around 36-38psi on a set of 19's.
Yes driving style could be a factor but when i first got the car i was baby'ing it around town and it still was quite high.

I'll change fuel and then see again. Do you use 93 octane because thats the highest you can get there or it is most suitable ?
We get a 91, 95, 98 and a 98 ethanol blend.

chokaay

In both of my 2009 E350 RWD Sport, I maintain my tires at 29.4psi / 34.4psi, which is 1.4psi above the recommended limit for <80mph driving, but very close to the recommended limit for >80mph. I have found that is the perfect balance between ride comfort and sportiness/firmness for me. As for gasoline, unfortunately for us in CA, we only have 91 octane, and most pumping stations have up to 10% ethanol in their gasoline.

That being said, to give others a frame of reference, I found that when I'm driving my 2009 E350 RWD around in the city, my mpg can vary between <=13mpg (for very aggressive driving/starts/stops all the time), to ~17mpg (my "normal" driving style), to 22mpg (extremely conservative, coasting most of the time).

For highway, my mpg can vary between <17mpg (very aggressive), to ~21-23mpg (my "normal" driving style), to 29+mpg (extremely conservative driving for around 65 miles... but I've never made it past 65 miles since I have a tendency to punch it to pass slower cars once in a while).

aintez

ok so were normal then :P

fortlaudsummer

wow I'm getting about 19 city and only 25.2 hwy

chokaay

I would say so... keep in mind your engine is larger than mine, so your mpg will most likely be less than mine.

chokaay

The difference between mpg's could be due to different octane ratings in premium fuels, or different % ethanol/alcohol mix, or different driving styles, or different environment (maybe you have more/less traffic lights, or usually commute less/more miles than I do on the city/highway, etc). Maybe it's all of the above!

fortlaudsummer

I run 93 octane from BP...so I don't know...

aintez

ok tried again but on freeway and reset while moving ... got 26mpg (9l/100km).
So i guess i should keep an eye on my driving habits and try a different fuel.

chokaay

I would say that's about right... the MPG for W211 E-Class is:

E350 RWD = 17 city / 24 hwy / 19 combined
E350 4MATIC = 16 city / 22 hwy / 18 combined

E550 RWD = 15 city / 22 hwy / 17 combined
E550 4MATIC = 13 city / 19 hwy / 16 combined

Thus I would imagine the E500 would fall closer to the E550 than E350. Also keep in mind that MPG also differs with speed as well, so your 26 MPG is for that particular speed... go any faster or slower, and you'll get a different MPG.

lovnlife

Your numbers (look like EPA sticker numbers) are way off for the E550 RWD, not sure about the others. I get 21-22 combined and if I drove it easy, it would be better.

CharlyE500

So my E55 is not so bad....
I get 20 Hwy and 13 city around 16.5 combined
Thats normal drive... if I drive bad... city could be less than 10MPG

aintez

lovnlife - hmm wierd how a lot of you guys are getting much better milleage. what year is your car ?

Charley - I suppose your E55 is essentially an e550 when your not on boost really.

Eich

For the heck of it, I've been running 87 Octane in my '05 E500 for the past few months. I continue to see the same MPG that you do. Around 19-20 in normal combined driving. Around 25 on the hwy between Northern Virginia and Western PA.

Even when I put my foot to the floor, performance is great and I never hear any pinging. I'm sure the computer is retarding the timing somewhat in certain conditions and I'm losing some peak horsepower but I've not noticed a change in MPG.