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Oil type for a 1.25L fiesta watch

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    I've been told that the oil needs changing in my car. Does anyone know if there is a special type I need to buy?
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    It will say in the handbook, depending on age I think its 15W40?
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    (Original post by Cj-Tj)
    It will say in the handbook, depending on age I think its 15W40?
    It's from 1996 - unfortunately the man I bought it from didn't have the handbook. I'll write that down and ask at a garage
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    Thats what Ford use in their newer engines, im sure it will be perfectly fine for older ones as well.
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    http://www.halfords.com/webapp/wcs/s...5581_langId_-1

    Put your registration in there and it tells you.
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    5w30, semi-synthetic
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    (Original post by Eulaca)
    5w30, semi-synthetic
    5w30 and 10w40 have the same properties until it gets cold, at which point 10w40 (I think?) is lighter. You can use either in Britain really.
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    (Original post by Cj-Tj)
    5w30 and 10w40 have the same properties until it gets cold, at which point 10w40 (I think?) is lighter. You can use either in Britain really.
    No they don't, using 10w40 can cause your valves to stick iirc.

    Do you understand how the raiting system works?
    the first number is the viscousity of the oil at a specified low temperature, the second number is the viscousity equivilent at a high temperature. This is done by using polymers that change shape.

    so a 10w40 at 100'c will have the thickness of a 40w oil at 100'c instead of a 5w oil.

    It can get a tad cold in the UK during the winter, this is when problems will really occur
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    (Original post by Eulaca)
    No they don't, using 10w40 can cause your valves to stick iirc.

    Do you understand how the raiting system works?
    the first number is the viscousity of the oil at a specified low temperature, the second number is the viscousity equivilent at a high temperature. This is done by using polymers that change shape.

    so a 10w40 at 100'c will have the thickness of a 40w oil at 100'c instead of a 5w oil.

    It can get a tad cold in the UK during the winter, this is when problems will really occur
    That makes no sense, I understand exactly how the rating system works.

    5w30 is a lighter oil (got it wrong yesterday) and so circulates better at lower temperatures, but provides less good lubrication at higher temperatures. This oil is used in colder climates, where the lubrication is required when its cold. Not so good for hot climates eg the dessert.

    10w40 is heavier, but is perfectly adaquate for UK climates because it very rarely gets cold enough for the additional benefits of the lighter oil to become apparent.

    Neither will harm your engine, and unless you live in northern Scotland either will do perfectly well. Even for engines which have a reccomendation for 5w30 its not uncommon to change to 10w40 after 60,000 miles or so.
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    vegetable oil
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    TSR Support Team
    (Original post by Oliver BEASTMAN)
    vegetable oil
    This thread is from 2009! Please check thread dates before posting in future.

    Thread closed.
 
 
 
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