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  1. #1
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    Red Line 5 wt or 10 wt oil for Fox fork?

    I'm going to change the oil on my 2008 Fox F29 80mm travel fork. I weigh about 185 with gear.

    I've read where people highly recommend Red Line oil. I've seen this http://www.peterverdonedesigns.com/lowspeed.htm chart before and it looks like the Red Line 10 wt fluid is closest to the Fox fluid. But I've also read where people have used the Red Line 5 wt fluid also. Just hoping for a recommendation from someone whose tried both the 5 wt and 10 wt oil and which one they recommend.

    I've dropped the air pressure in my fork to about 75psi which is a little below the recommendation in Fox's chart. But it seems like I still don't quite get the full travel. So I was thinking about trying the 5 wt oil instead of the 10 wt.

    Also I think Fox only sells 10wt "Fox" oil now and all their 2010 model forks call for 10wt oil. So does that mean there is so little difference between the old Fox 7.5wt and the current Fox 10 wt oil that they just discontinued the 7.5 wt oil because the 10wt oil works just fine?

  2. #2
    mtbr member
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    Fox Fork Oil?


    Also some have found too much float fluid in the air chamber reducing travel.

    I mix redline heavy and med for my 36.

    What you do can also change your rebound settings.

  3. #3
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    Use 5wt oil from motorcycle shop.

  4. #4
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    I use silkolene rsf 10 which is the fluid used in the 36mm forks , 32 R series forks and fit cartridges. It works better for me on my f120RL at 175 lbs as I can lower air pressure and it gives good mid range performance without affecting how active it is in low range.

  5. #5
    in da house CREW
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    You could also mix the two to get closer to the 7 wt oil.

  6. #6
    Waiting for Godot
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    excuse my inexperience, but is the redline oil the regular "motor oil 5-20wt" or this one?

    http://www.redlineoil.com/product.aspx?pid=27&pcid=18
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  7. #7
    EDR
    Reputation: eatdrinkride's Avatar
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    Quote Originally Posted by OilcanRacer
    excuse my inexperience, but is the redline oil the regular "motor oil 5-20wt" or this one?

    http://www.redlineoil.com/product.aspx?pid=27&pcid=18
    They're not talking motor oil. Suspension fluid, like your link points to.

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