E270 Owner
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Italian tune up time
These things need a good clear out, my drivings 40% London 60% Motorways.
The E320 runs on no special diesel but a dose of 2 stroke oil @ 500ml in a 90 liter tank full, when I can remember to do it.
W211 E320cdi 7G poor consumption
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Italian tune up time
These things need a good clear out, my drivings 40% London 60% Motorways.
The E320 runs on no special diesel but a dose of 2 stroke oil @ 500ml in a 90 liter tank full, when I can remember to do it.
jon_viola
Active Member
Yes the Italian tune did seem to be an option but interestingly the car doesn't smoke at all when your flooring it. I'll keep trying though with some diesel stuff.
Out of interest why the two stroke oil? Not heard of that one before...
Out of interest why the two stroke oil? Not heard of that one before...
D
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There's either something wrong with some of your V6 CDI E320's or there's something wrong with your driving style.
This was my 57 plate E320 CDI Sport:
This was my 57 plate E320 CDI Sport:
gIzzE
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The one question you haven't answered is what temperature is it getting to?
It should be at 92ºc and get there within around 10 minutes, at 80ºc it is over fuelling by around 15%, at 70ºc it is over over fuelling by some 25%.
I would fill up with decent fuel, put half a litre of 2 stroke oil in there and then give it some beans for a good few miles and clear things out.
By check the thermostat first, these only last a few years before they start to drop off and can make a huge difference.
What tyres are on it too? These can make a huge difference.
The official figures are not great though, something like 27mpg urban and 36mpg combined, or was that just the estate?
It should be at 92ºc and get there within around 10 minutes, at 80ºc it is over fuelling by around 15%, at 70ºc it is over over fuelling by some 25%.
I would fill up with decent fuel, put half a litre of 2 stroke oil in there and then give it some beans for a good few miles and clear things out.
By check the thermostat first, these only last a few years before they start to drop off and can make a huge difference.
What tyres are on it too? These can make a huge difference.
The official figures are not great though, something like 27mpg urban and 36mpg combined, or was that just the estate?
Had a LR Discovery last year; the concept of adding 2 stroke oil to a tankful of diesel was tried and debated at length on the Disco3 site:
DISCO3.CO.UK - View topic - The 2 Stroke Oil thread - post all related here
The general consensus was an improvement in performance and economy, and could be a much cheaper option than Redex/Millars. Interesting to hear of experiences with a Merc.
gIzzE
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Yamaha Fan who started that discussion runs a 3 litre Mercedes E Class diesel with a DPF, and it was Mercedes that used 2 stroke in their Paris to Bejing run back in 2007 as they were not certain of the fuel quality of the fuels they would be able to get hold of in certain countries.
It makes a huge difference, you can here as soon as you stop using it.
It makes a huge difference, you can here as soon as you stop using it.
jon_viola
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Thanks for all your replies. I will try the two stroke! Best to add to a full tank of just throw it in?
The temp seem fine. It sits on one bar above the 80 at all times.
The car is on correct staggered 18" AMG's with Contis all round.
The temp seem fine. It sits on one bar above the 80 at all times.
The car is on correct staggered 18" AMG's with Contis all round.
gIzzE
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That's 'stat is not fine then, it's ****ed.
It should be at 90°c and it will be using around 15% more fuel than it should.
Actually, depends on the model, one bar might be the 90°c mark on your gauge?
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gIzzE
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Maybe?
Some guages have 80 wirtten then a line for 90 and then 100 then a line for 110 and then 120 written again.
My ML was sitting at just a smidge over the 80 line and once the 'stat was changed you could clearly see it was up to the next line which was 90°, and this gave a jump from 26mpg to 30mpg immediately.
gIzzE
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500ml to a full tank. There's some debate on the grade of oil for engines fitted with a DPF (trawl through the Disco3 thread). If without, any mineral 2 stroke is fine and will readily mix with the diesel.
Paddcomp
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This made me check my temp, thought it was 80 but it's 90 or where the white line is. Still only 34mpg on a long run though.
gIzzE
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So what tyre pressure are you running?
36psi front and 38psi rear?
What year is it? has it got DPF?
36psi front and 38psi rear?
What year is it? has it got DPF?
jon_viola
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Its a 2005 (55 plate) V6 with full AMG kit including exhaust tips. Looks like an E55 Estate.
I'm running the tyre pressures on specced on the car plate but will try yours if different.
It has a DPF which was cleared 3 months ago.
I'm running the tyre pressures on specced on the car plate but will try yours if different.
It has a DPF which was cleared 3 months ago.
gIzzE
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Cleared 3 months ago?
It should be clearing more often than that, my 56 plate facelift didn't have a DPF, but on my BMWs that have had them they tended to do a regen every couple of weeks, as soon as I was sat on the motorway for a while in cruise mode after a bit of a blat they would do it.
I would go and give it some wellie and then sit on the motorway at 70mph for a few miles and see if it forces one, you might be blocked up, or it might be trying to do one a lot and not finishing and that will eat fuel.
It should be clearing more often than that, my 56 plate facelift didn't have a DPF, but on my BMWs that have had them they tended to do a regen every couple of weeks, as soon as I was sat on the motorway for a while in cruise mode after a bit of a blat they would do it.
I would go and give it some wellie and then sit on the motorway at 70mph for a few miles and see if it forces one, you might be blocked up, or it might be trying to do one a lot and not finishing and that will eat fuel.
gIzzE
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MERCEDES' advice in the handbook is that that any DPF car should undertake a journey that lasts for at least 20 minutes every 500 kilometers [ 300 miles ] to allow the regeneration process to take place in a car where the exhaust has reached adequate temperature.
In other words rag it first!!
In other words rag it first!!
2010 CLS with the V6 diesel engine , 25 around town - 40 on the motorway.
Best ever was 44mpg at 60mph with a feather light foot. I try to convince myself it should be better but when you remember the car has a 3L turbo charged engine , an automatic gearbox , it weighs nearly 2T and has an older type motor then it is not too bad especially when 95% of my driving is stop start around town with the maximum average daily journey being three miles.
My old Aero Saab would return 20mpg and my wifes Scenic averages 28mpg doing the same daily drive so the big Merc aint too bad in the big scheme of things.
Kenny
Best ever was 44mpg at 60mph with a feather light foot. I try to convince myself it should be better but when you remember the car has a 3L turbo charged engine , an automatic gearbox , it weighs nearly 2T and has an older type motor then it is not too bad especially when 95% of my driving is stop start around town with the maximum average daily journey being three miles.
My old Aero Saab would return 20mpg and my wifes Scenic averages 28mpg doing the same daily drive so the big Merc aint too bad in the big scheme of things.
Kenny
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Other things to consider.
Injectors, if not working to spec can gobble loads of extra fuel.
Exhaust system. Some people have decatted these as they get to their older years, and normally on a diesel that is fine, but if you have a DPF the pre cat won't get to temperature and therefore the car will be in a constant state of trying to regen, again costing you loads of fuel.
Are you 100% sure your car has a DPF?
I thought they came in later than that?
Injectors, if not working to spec can gobble loads of extra fuel.
Exhaust system. Some people have decatted these as they get to their older years, and normally on a diesel that is fine, but if you have a DPF the pre cat won't get to temperature and therefore the car will be in a constant state of trying to regen, again costing you loads of fuel.
Are you 100% sure your car has a DPF?
I thought they came in later than that?
