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Thread: does oil have a shelf life?

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    Default does oil have a shelf life?

    I ask because my vec is getting due a oil change, and I must have 4 galls of GM semi synth 5-30/5-40 in my shed it has been opened but must 3 to 4 years old it looks ok but is it?

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    Regular Member nibblitz's Avatar
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    If it was unopened containers then it would be perfectly fine, but as you say yours has been opened I wouldnt use it myself..

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    Regular Member JagRigger's Avatar
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    ..........it does in aviation

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    If the cap has been on in all that time I wouldn't be worried at all, after all its 4 million years old all ready.

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    Quote Originally Posted by DasArab View Post
    If the cap has been on in all that time I wouldn't be worried at all, after all its 4 million years old all ready.
    yes, a very good point

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    Regular Member Handyandy-UK's Avatar
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    Quote Originally Posted by JagRigger View Post
    ..........it does in aviation
    .... and when you demand a roll of black nasty it also comes with a shelf life on the voucher.... you know... they date after which it suddenly becomes non-sticky!



    But on topic, oil is hygroscopic... it will absorb moisture over time unless in a sealed container. For the cost of a can of new oil, I wouldn't use the opened can.

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    Quote Originally Posted by Handyandy-UK View Post
    .... and when you demand a roll of black nasty it also comes with a shelf life on the voucher.... you know... they date after which it suddenly becomes non-sticky!



    But on topic, oil is hygroscopic... it will absorb moisture over time unless in a sealed container. For the cost of a can of new oil, I wouldn't use the opened can.
    well, it is in a sealed container, but it is also a cold damp old shed,

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    Regular Member Handyandy-UK's Avatar
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    Quote Originally Posted by CLOMP View Post
    well, it is in a sealed container, but it is also a cold damp old shed,
    Sealed from original filling - probably ok.

    Sealed (has been opened and lid replaced) - I wouldn't use it.

    (But then I get my oil/filter changes done at my local National Tyres - only about £40 - £45 booked online.)

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    I wouldn't hesitate to use it if it's been opened and closed again. As long as the top was fairly tight on it'll be fine I would have thought. It's oil not milk!

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    Regular Member Ste's Avatar
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    I defo WOULD use it.

    Even if it has got a little water in it, it will evaporate as soon as the oil gets hot anyway. And more to the point, oil in the engine gets water in it everytime you start the car and switch off before it's got up to temperature, from water vapour condensation.

    Not an issue if the cap was on.

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