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Fuel, Premium or Regular

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Sue new MB owner!!, Oct 15, 2012.

  1. Sue new MB owner!!

    Sue new MB owner!! Senior Member

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    Your Mercedes:
    SLK 200 /2009 /1.8
    Just wanted your advise... re Petrol for my SLK 200. Pemium or regular? which is best?? recomended???.... I am confused :Oops:
     
  2. oilman

    oilman Forum Supporter Authorised Forum Supporter

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    Is it tuned to use super or normal fuel?
     
  3. OP
    Sue new MB owner!!

    Sue new MB owner!! Senior Member

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    not sure Oilman.... where do I find out? :Oops:
     
  4. BAZZER1

    BAZZER1 Senior Member

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    Hi Sue
    Have you had a look in your Hand Book or if this is not stated, go to your nearest MB Dealer or Indie Specialist where I am sure they will be able to advise you on the correct grade of fuel to use.
    I'm sorry I can't help any further
    Best of luck with this
    BAZZER1
     
  5. teddycatkin

    teddycatkin Senior Member

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    Your Mercedes:
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    Simple anser = Premium ---Tesco do 5 star or Sainsbury's is cheapest in our area dont use anything else !
     
  6. brandwooddixon

    brandwooddixon Senior Member

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    Just to be clear, you want 95 RON fuel.

    I don't think that any petrol MBs sold now require 98 RON fuel.

    In the UK that's sold as regular.
    On the continent it tends to be sold as premium.
     
  7. jberks

    jberks Senior Member

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    Your Mercedes:
    Jaguar XF 3.0 S, LR Freelander 2, Fiat 500 & Fiat Panda
    I'd use regular. No real benefit from premium. Possibly a tank of super-plus fuel every now and then or else a shot of additive to keep things clean but 5* - nah.
     
  8. television

    television Always remembered RIP

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    You are right, it was very confusing in Germany and Holland with 3 grades offered, no one here as you say needs 98 ron,,,, some find the fuel consumption worse, I did when I had the chance to try it in good conditions
     
  9. MBDevotee

    MBDevotee Active Senior Members

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    Your Mercedes:
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    I believe the engine has a "knock sensor" - so it should run better on Super - but try them both and see!
     
  10. television

    television Always remembered RIP

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    The knock sensor will retard the engine if need be, but no standard MB will knock on 95 ron fuel, Knock is all to do with the compression ratio and poor detonation when fuel used has an octane number under what is needed.

    My CL216 is a high performance car, the handbook says, "refuel only with unleaded with a grade of at least 95 RON /85 MON" If I put in 98 RON the engine cannot burn it to any advantage at all. I can also use 91 RON if stuck in some countries where that is the norm, and this is where the anti knock sensor will retard the engine
     
  11. hsloco

    hsloco Active Senior Members

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    Just to bring this topic up again and I am sorry if someone else has already done this but:-
    I have a late 2007 CLK 280 C209 sport etc. I have been using regular petrol on a daily basis but every 4th or 5th fill of the tank I use premium/super. The car seems happy with this and I have not noticed any problems. I recently logged on to the MB official website and entered my vin no. and amongst the information provided it stated that the car should be run on "super" all the time, what is your opinion?
     
  12. whitenemesis

    whitenemesis Senior Member

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    What is MB's definition of "super"? It should state a RON value as a minimum requirement. Every owner's handbook I've seen states the minimum RON required. There is no detriment in using a higher RON fuel
     
  13. Ricardo_e220

    Ricardo_e220 Senior Member

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    Hsloco, what it's called is largely irrelevant it's the RON count that matters. No matter what people say we have good quality fuel here in the uk, normal juice ( from say shell or Bp) will be just fine. Even high powered cars like Subaru or Mitsubishi which are highly tuned turbo engines are advised to run on the 98 Ron for full performance, 95 Ron detected by the ecu will simply retard the engine as other have said.

    Simply not worth the extra money. I have never been able to tell the difference in diesel or petrol cars between supposed top spec fuel and the cheapest....
     
  14. television

    television Always remembered RIP

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    95 ron fuel is more than good enough for your engines requirements, do not forget that some countries have nothing over 90 ron, and the cars have to run on that.
     
  15. jenson1961

    jenson1961 Guest

    I use normal for 3 weeks then treat her to the best for 4th week runs a treat

    steve
     
  16. V6Matty

    V6Matty Senior Member

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    i try to use the better stunn in the old girl and do notice she doesn't get as sooty on motorways, but an italian tune up always does the trick to clear things i gues :lol:
     
  17. oilman

    oilman Forum Supporter Authorised Forum Supporter

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  18. BEJ

    BEJ Senior Member

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    Your Mercedes:
    Volvo XC60 se lux nav geartronic. SLK230K now gone.
    Look on the inside of the filler cap. It will give relevant information on there.
     
  19. BAZZER1

    BAZZER1 Senior Member

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  20. oilman

    oilman Forum Supporter Authorised Forum Supporter

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