N00b question about trans oil, high mileage wrx
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This is a discussion on N00b question about trans oil, high mileage wrx within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; For my 2004 WRX with over 130k, should I use a synthetic based oil for the trans/rear diff or can ...

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    N00b question about trans oil, high mileage wrx

    For my 2004 WRX with over 130k, should I use a synthetic based oil for the trans/rear diff or can I use a quality standard 75w-90? Just a normal daily driver no auto-cross or racing...

    Thanks in advance...

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    He simply abides. SD_GR's Avatar
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    I have similar use patterns to you and I use regular oil that meets the factory spec (Valvoline in my case) based on availability and price.
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    Captain James of the SS Impreza has gone down with the ship Drews's Avatar
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    Quote Originally Posted by SD_GR View Post
    I have similar use patterns to you and I use regular oil that meets the factory spec (Valvoline in my case) based on availability and price.
    How does our transmission feel? Any notchiness (is that a real word?) I've had the vehicle for only about 3 weeks and have been going thru all of the "normal" maintenance that wasn't done and trying to remedy it. I'd love to use the Extra-S but at $15 a quart it's a bit hard to justify for normal daily driver. If I had a built Stage 3 WRX/Sti then yes it would work but... The Valvoline 80w-90 dino is GL5 rated as required by Subaru, so it should be ok.

    Thanks!

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    When in doubt, open the owners manual and see what it recommends. Can't go wrong by it.

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    Captain James of the SS Impreza has gone down with the ship Drews's Avatar
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    Quote Originally Posted by 68jimmy View Post
    I'd love to use the Extra-S but at $15 a quart it's a bit hard to justify for normal daily driver. If I had a built Stage 3 WRX/Sti then yes it would work but
    lolwut? First of all, it's not that expensive. Secondly, it's probably the BEST gear oil for stock Subaru transmissions. But hey, it's just what the manufacturer produces, what the hell do they know?
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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by 68jimmy View Post
    How does our transmission feel? Any notchiness (is that a real word?)

    Thanks!
    It's as notchy, vague, and reluctant to shift into 1st at 145,000 miles as it was the day I bought it with 6 miles. I've used 75W-90 GL5 Valvoline every 30K service. No issues.
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    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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