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Oil for Petrol BMW

  • 24-08-2010 9:56am
    #1
    johnmolloy554
    Registered Users, Registered Users 2 Posts: 408 ✭✭


    Hi
    what is the difference between 5W 30 and 5W 40 for a petrol 3 series? I know it has to be fully synthetic.

    Cheers


Comments

  • #2
    [Deleted User]
    Posts: 23,339 ✭✭✭✭ [Deleted User]


    It's viscosity when hot, which oil is recommended for the car ? Use that one anyway.


  • #3
    johnmolloy554
    Registered Users, Registered Users 2 Posts: 408 ✭✭johnmolloy554


    I just found out its 5W 30 but I bought 5W 40 this morning. Would it make a huge difference if I used it?


  • #4
    danjo
    Registered Users, Registered Users 2 Posts: 589 ✭✭✭danjo


    I thought the BMW's used 0W30. :confused:


  • #5
    cadaliac
    Registered Users, Registered Users 2 Posts: 2,903 ✭✭✭cadaliac


    johnmolloy554 wrote: »
    I just found out its 5W 30 but I bought 5W 40 this morning. Would it make a huge difference if I used it?
    Any warrenty issues or trouble down the line will be blamed on you using the wrong oil. By rule of thumb, use the recomended oil. I don't think that it will make a huge difference myself but if the car is going for a long life service interval - I would deffo use the correct recomended oil.
    Remember that is recomended for a good reason.


  • #6
    voxpop
    Registered Users, Registered Users 2 Posts: 2,800 ✭✭✭voxpop


    cadaliac wrote: »
    Remember that is recomended for a good reason.

    Usually marketing and partnership reasons.


    My 5 series originally was recommended 5w40 semi-synth. Now bmw recommend that all cars are fully synth. They recommend castrol as well - wonder why :pac:

    M cars use TWS 10w60


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