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Thread: Oil Change - Hot or Cold Engine?...

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    Default Oil Change - Hot or Cold Engine?...

    I am due an oil change and have been thinking...why bother warming the car up?

    When itís cold all the oil + suspended junk is in the sump, where you want it. This isnít the case with a warm engine.

    Discuss!

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    [Ex]Admin Duncan's Avatar
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    Warming the engine up a bit, nothing too silly, makes the oil thinner so it therefore drains more easily. Stone cold oil won't flow as easily or quickly.

    You simply warm the engine up a bit, then leave it off for 5-10 mins. The oil will have settled back into the sump but still be plenty warm/thin enough.

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    Regular Member marktaylor's Avatar
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    Regular Member Graham's Avatar
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    Vehicle : Focus

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    Year : 62

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    Ive always got engine up to running temp, usually after a 20 mile journey.

    Then straight on to my ramps and drain.

    Is this wrong, as thinking now when the oil is draining, there is nothing to lubricate the hot engine parts?

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    VIP-Member Das's Avatar
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    Vehicle : Lada

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    Hot or cold, ive done it both ways

    Quote Originally Posted by Graham View Post
    Is this wrong, as thinking now when the oil is draining, there is nothing to lubricate the hot engine parts?
    There will always be a think coating of oil to protect bearings, remember there is no moving parts to lubricate when the engine is switched off anyway. In here lies the reason to buy a good quality oil that helps protect at start up, as that split second before the oil system pressurizes is where the damage is done.

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    Regular Member Graham's Avatar
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    Vehicle : Focus

    Trim : Titanium

    Engine : 1.6 TDCI

    Year : 62

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    Yes good point about no moving parts when engine switched off.

    Ive always used vx 10/40semi. Good enough for me and the wifes 12 yr old Corsa.

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    With the engine up to normal temperature there's a chance you'll burn your hand when removing the sump plug. Health and safety and all that.

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    Regular Member marktaylor's Avatar
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    Quote Originally Posted by ChrisBilly View Post
    WTF - what SHE said !!!!!!

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    Regular Member dv8's Avatar
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    Vehicle : Veccy C

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    Warm for me.. i found this works best for me.. but after its stood for a good 5mins, let the oil drain down.

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