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5w/20 or 5w/30, does it make a difference 900

posted by  940 4ever on  Sat Oct 16 19:05 CST 2004
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last visit: Wed Apr 21 11:04 CST 2010
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I recently just bought a mazda for winter driving just that I can put my 940 in the garage for winter. The mazda calls for 5w/20 engine oil but it is so diffcult to find the 5w/20 on the market. If I put 5w/30 in the car, it is going to make any difference? Any advices will be appreciated.








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    5w/20 or 5w/30, does it make a difference 900

    posted by  anarchyx34 on  Mon Oct 18 02:42 CST 2004
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    last visit: Thu Feb 21 03:14 CST 2008
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    Probably slightly less fuel economy, if any difference at all. I'm surprised you're having trouble finding 5w-20 though, most of the large auto parts stores carry it now (pep boys, advance auto, etc...).

    What mazda did you buy?
    --
    '93 945 turbo. A big comfy box.... and a '90 Mazda 626 GT turbo, 16psi on upgraded turbo and a bunch of other mods.








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    5w/20 or 5w/30, does it make a difference 900

    posted by  someone claiming to be tjts1 on  Sun Oct 17 05:36 CST 2004 [RELATED]

    No difference what so ever. Not even fuel economy. Your engine will probably last longer too with 5w30.








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      5w/20 or 5w/30, does it make a difference 900

      posted by  nkfro on  Mon Oct 18 16:44 CST 2004
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      The auto manufacturers use the slight MPG gain in a collective effort to improve CAFE (corporate average fuel economy) ratings. The gain might be slight by most standards, including yours or mine, but it IS still a gain.







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