5w-30 or 10w-30 castrol
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This is a discussion on 5w-30 or 10w-30 castrol within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I am wondering if I should put either 5w-30 or 10w-30 Castrol Syntec oil in my '06 wrx. I live ...

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    5w-30 or 10w-30 castrol

    I am wondering if I should put either 5w-30 or 10w-30 Castrol Syntec oil in my '06 wrx. I live in New Hampshire and the weather lately has been 32-45 degrees.

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    Registered User irvin787878's Avatar
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    if i understand it right the number before the w is cold-start viscosity you would be best to refer to the owners manual to make sure your in the temp ranges for your area and type of oil
    HAWK-EYE ALLIANCE #7878
    2007 WRX TR
    My work in progress. http://www.clubwrx.net/forums/off-to...ld-thread.html

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    Registered User mudferret's Avatar
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    A 10w-30 is a more viscous oil, absolutely no reason to run it at anytime in an '06, especially in winter.
    ...Rob.
    MMVI WRX - VF43 Airboy Tuned @ 3500'

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