ItalianTuneUp
MB Enthusiast
I didn't forget anything, I was just quoting from a web page: the text was copied and pasted from the web page.
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Red line 85 plus
No I haven't done that. I expect if I paid a 10p/15p premium per litre on shell v power, or equivalent, I may see improved mpg, but is it worth it? That's almost a £15 premium per tank on my car.
It seems likely the shell v power cleaning additives would be beneficial, certainly not harmful, but hopefully the fact I mostly do motorway miles keeps engine etc clean anyway, from the Italian tune up effect
Millers what? What's the product name?
I didn't forget anything, I was just quoting from a web page: the text was copied and pasted from the web page.
I stand corrected - the author of the website quoted forgot...
Wasn't having a go at you - honestly
I drive weekly from South London to Leeds and have noticed that I consistently get improved fuel economy when the tank is filled up with Asda diesel. On a run up to Leeds on my W169 A180CDI I typically get around 53 to 55 mpg according to the trip computer. But when I fill up at Asda I can easily get 58 to 59 mpg and even reached 60mpg once.
every liter helps...
If your merc has done over 180000 miles now then surely it was pretty high in September so maybe wear and tear on the injectors was a major factor not just suspect fuel.Supermarket V Branded is a topic I have been watching for quite some time. I have only had my CLK 270D since last Friday so I cant comment on the Mercedes engines and how it reacts to the cheap and branded diesel.
My previous car was a Jaguar x type 2.0d, That when I traded it in last week it had covered 181500 miles. What I can say is that when I used the supermarket fuel the car was very sluggish, rough sounding and returned very poor mpg. In September of last year I had to replace all the injectors and was told then by a diesel specialist that the supermarket diesel has little or no additive (he did tell me the technical name for the additive but one has forgotten it) that a diesel engine needs to lubricate the injection system compared to the likes of Shell, BP and the like.
I know a lot of other Jag owners that have been putting 2 stroke oil in with every fill to replace the additives that the cheap fuels don't have. They report by doing this the engine runs smoother produces less smoke on hard acceleration and they claim that it helps keep the injectors from getting to much carbon build up.
I would be interested to see if other Mercedes owners agree with this and do the same with their cars.
After I had the injectors replaced on the Jag I never went back to using the cheap fuels and used the shell regular diesel only. But on the odd occasion where I could not get shell and had to put in a supermarket fuel. I can say I really did notice the difference in performance and mpg.
I did for a while try the Shell Premium diesel but found compared to their regular diesel there was no noticeable difference in running or mpg. The only difference I noticed was to my wallet, so I went back to using just the shell regular.
I was told by the diesel specialist not to use the supermarket fuels or if I have to just put enough in to get to a branded fuel station as this fuel is no good for the injectors or fuel pumps ect.
As a rule now for my Mercedes I will only use shell where I can but I would be interested to know your opinions of Supermarket v branded and the Mercedes engine as I am hoping its a much better engineered engine than the weak engine that was in my x type.
Marcel-Anthony
It has to be said, that people who haven't noticed any appreciable difference in performance or mpg with premium fuels are not really fully addressing the issue. The question is, are these fuels having a beneficial effect on the state and longevity of the engine? Something only time will tell, and something, I would suggest, that cannot be determined by the odd tankful.
I expect you're right.
One thing that nags away with this idea though is that knowing that dealerships love money, why doesn't MB sell their own 'MB' diesel additive?
If your merc has done over 180000 miles now then surely it was pretty high in September so maybe wear and tear on the injectors was a major factor not just suspect fuel.
Personally I have experienced no problems with Tesco diesel, but the highest mileage ive done was about 110000 in a vw bora.
This is my main concern, that I'm not damaging the engine etc from unknown potentially harmful/clogging-up additives.
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