350 mpg

[BenzedUP]

How can you achieve nearly 50mpg out of a 3.5L V6 with over 306hp?

What's the most you've had out of your 350 guys?



In the last 5k I've done in my C204 350 I've averaged 40mpg , mainly motorway driving.

I'm so impressed with the efficiency of this new 350 engine.

Shame it's discontinued now.

 

[BenzedUP]

By the way I'm talking about the petrol 3.5L not the 3L CDi 350.

 

[johns E350]

I have not managed that in my 350 CDI but the newer engines have further improved as can be seen by your return

 

[BenzedUP]

Yeah I have to say I'm extremely impressed with the fuel efficiency. I was torn between the saloon C350 CDi 265hp or the petrol C350 Coupe, glad I went for the petrol.

I use to run a AMG as a daily, it's so nice not having to visit the petrol station every day, lol.

I keep the AMGs locked away for fun now. Saving a lot on fuel which is great as I do a lot of miles now a days Inc trips abroad.

 

[V12]

I read the title and was expecting some mad hybrid car that managed 350mpg!!

 

[Peter DLM]

Is that your pic?

If not, I'd say that was reset during the journey, probably at the start of a very long slight decline with following wind and constant MPH.

Or, it's had a horrible remap that's fiddled the computer calc for MPG.

I've experienced the 3.5 L motor in lots of guises and no way will it return that. Most I've had was 40mpg and that was at the end of a long motorway trip.

 

[BenzedUP]

Yes it's my own picture that I just took today on the way from work.

Car is standard MB updated the ECU only 1 month ago, so it's not had a remap.

I turned on the car and drive it, not reseted anything, I constantly get over 40mpg on it, petrol needle hardly moves.

MB say it is capable of 50mpg on the motorway.
Another pics I took today.

 

[Deleted member 37751]

I'd be interested to see the average speed at around 25mph over 30 minutes.

The shame about your figures are that I'm 99% certain that Mercedes have dropped the V6 petrol from the C-Class range.

 

[Peter DLM]

You won't see the 3.5L in anything now over here.

It's gone.

 

[Peter DLM]

Yes it's my own picture that I just took today on the way from work.

Car is standard MB updated the ECU only 1 month ago, so it's not had a remap.

I turned on the car and drive it, not reseted anything, I constantly get over 40mpg on it, petrol needle hardly moves.

Are you sure the CDI badge didn't just fall off the bootlid?

That is utterly astonishing

 

[V12]

Can you do a tank to tank check for us to see how accurate those figures are? Some MB have been known to be up to 20% innacurate.
Either way it's very impressive and many cdi drivers would be happy with those figures!

 

[BenzedUP]

I'd be interested to see the average speed at around 25mph over 30 minutes. The shame about your figures are that I'm 99% certain that Mercedes have dropped the V6 petrol from the C-Class range.

I was cruising around 60ish, the max speed I've hit was 80mph for a short period of time.

It's all about smooth driving, no harsh acceleration or braking - Just letting the car get up to speed and slow down by itself and it helps having such an impressive engine.

Yep as I said in my OP it's discontinued.

 

[BenzedUP]

Are you sure the CDI badge didn't just fall off the bootlid? That is utterly astonishing

Lol, it's too quite and revvy for a CDi

If I'm honest I am very impressed with the fuel efficiency.
When I bought the car I never really expected to get 40mpg.

 

[mct_cars]

Impressive MPG from a Petrol.

The Temp gauge needle not being horizontal would do my tree in though.

 

[johns E350]

You won't see the 3.5L in anything now over here. It's gone.

What is the E 400 is it also a 3L

 

[BenzedUP]

What is the E 400 is it also a 3L

It's a 3.0L Bi-Turbo making 333hp!

 

[Peter DLM]

What is the E 400 is it also a 3L

It's a 3.0 twin turbo V6. So smaller capacity and lower rev limit, but who cares when there's two turbos! :bannana:

 

[Peter DLM]

Ah, I missed the latest post. Ignore.

 

[tali]

Is that your pic?

If not, I'd say that was reset during the journey, probably at the start of a very long slight decline with following wind and constant MPH.

Or, it's had a horrible remap that's fiddled the computer calc for MPG.

I've experienced the 3.5 L motor in lots of guises and no way will it return that. Most I've had was 40mpg and that was at the end of a long motorway trip.

40 seems right going by official.(Extra Urban is equivalent to the 140mph speedometer Ford fitted on boggo 1.6 cars) YET it is the figure 99% of drivers rely on
Urban mpg 29.4 mpg
Extra Urban mpg 50.4 mpg
Average mpg 40.4 mpg

 

[def90cars]

Reminds me of the first time I saw a "VW Lupo 3litre"..... OMG I must have one!!!! Oh, it's 3 litres/100km..... doh!! The E400 is new 3.0 litre bi-turbo - takes the fight to the BMW 535i etc. 333bhp and 40ish to the gallon.