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Thread: engine oil viscosity

  1. #1

    Default engine oil viscosity

    I have a 76 Mercury Marquis 2 door 400 cu in, I live in the UK and take this car to shows (when we get some going again over here) and the car gets a lot of attention and I love driving it. I shipped it in December 2018. Can anyone tell what viscosity engine oil is recommended by Ford for my car, I have several workshop manuals but there is no mention of what I want. Thanks for your help guys.

  2. #2
    Wagon Addicted Tiggie's Avatar
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ID:	5628810w-30 or 10w-40.

    There is a 76 in the junkyard I'm headed to today. Usual to get one this old.
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  3. #3
    I'm an air-conditioned gypsy gadget73's Avatar
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    10w30 or 10w40 sounds right to me. If the oil light flickers or it runs really low pressure, go for the 10w40.

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    Wagon Addicted Tiggie's Avatar
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    *in my previous post, "usual" should have said "unusual". The junkyard car was pretty straight. Pretty well cared for but outdoor storage had taken its toll. Had some weird integral carrier rear axle. Was expecting a 9".
    1990 Country Squire - weekend cruiser, next project
    1988 Crown Vic LTD Wagon - waiting in the wings

    GMN Box Panther History
    Box Panther Horsepower and Torque Ratings
    Box Panther Production Numbers

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