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Oil Pressure Light

Discussion in 'General Chat' started by filipharvey, Sep 20, 2007.

  1. filipharvey
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    filipharvey Amusing Tagline

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    [Sep 20, 2007]
    Checked the oil on Mrs' A4 at the filling station today and it was low. Real low. So I bought a small bottle of cheap oil ('twas all they had - CarPlan 10w-40 Mineral) and filled it to the required level.

    Drove about 10-15 miles and the oil pressure light came on.
    Stopped the car, and it had gone off so drove it home (2 miles). The light came on again. Once again I turned the engine off and on again, no light!
    However, if I take it over 2000 rpm it will light up.

    Any ideas what is causing it? It is running ok, no unusual sounds or anything.
    Could it just be a sensor? Where is the oil pressure sensor?
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  3. simonwjones
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    simonwjones Member

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    [Sep 20, 2007]
    Its obviously, the oil you added isnt up to spec. I would empty the lot and refill with proper oil


    Simon
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  4. filipharvey
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    filipharvey Amusing Tagline

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    [Sep 20, 2007]
    I guess the problem is related to the oil (although I'm sure I've used it before with no problems) but I can't see how it would affect pressure.
    Would it?

    EDIT: I've just checked in my shed for the old oil I had been using. It is a Semi-Synthetic 15w-40 another budget brand but it has the required specs on it. I have only been using that as my uncle gave it to me at some point.

    Could it be the mixing of these two causing a problem? Is it now too thin or something?
    I'll hold my hands up and say I haven't a clue about oils!!!
    #3
  5. audi80sport
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    audi80sport is it home time yet?

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    [Sep 20, 2007]
    if im right and correct me if im wrong but if you use mineral oil then go to semi Synthetic or indeed fully Synthetic you cannot ever go back to mineral? also i read somewhere on this site i believe that the oil best to use is audi/vw own oil name escapes me now but it has something to do with the viscosity the ??w-??w if you get me? it needs to be a certain thickness...once again correct me if im wrong please...
    #4
  6. LaSarthe&Back
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    LaSarthe&Back Member

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    [Sep 23, 2007]
    Reckon your oil pick up pipe is becoming blocked. This makes sense when the engine is taken over 2krpm, as the pump is trying harder to push it through a smaller hole than usual.

    Several S3's pumps have failed, worse case being a new engine!!

    Do a search for oil pump, and then get it booked in for a new pump and pipe.

    The pump isn't the problem, but being strained, you don't know when that'll give up the ghost either!
    Best of luck
    Andy
    #5

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