Oil for Progressive Fork Springs

[heavyd]

I tried searching this on the forum but couldn't find the info to be sure, and Dag's site is still down. From what I have found, 15W fork oil is recommended with the progressive springs but I am trying to confirm how much oil. I know you measure from the top of the fork to know you have the right amount but that doesn't help me order it.

If I am reading and translating this to Canadian right, I would need to order 1.5L of oil?

Thanks for any input.

[sandy]

In America, we buy 2 quarts but have oil left over. Ten weight oil is standard and 15 wt will firm up the damping.

[hubcapsc]

I used 10 wt., I put in exactly how much the manual sez to, using the springs-out
measured-from-the-top method. I like stiff suspension, I wonder if something
didn't go right for folks who used 10 wt and thought they were too soft...

-Mike

[heavyd]

In America, we buy 2 quarts but have oil left over. Ten weight oil is standard and 15 wt will firm up the damping.

Thanks Sandy, I will get 2 L so I know I will have extra.

I figure I would be better off to go with the 15W, because I had to use the HD progressive springs on the back. I weight about 270lbs, frequently have a passenger and take at least 1 long trip with a passenger + luggage each summer. Opinions?

[Jess from VA]

I think you're better off using the recommended 10wt.  I have also read that all oils used in forks are not exactly equal (ie all 10 wts are not identical in dampening) (do some internet reading).  If worried about enough stiffness, use exactly the amounts called for. 

Next time I do mine, I'm leaving out an ounce and a half on each side.  I once had a dealer do my forks, and for a year afterward it felt like I had hardtail forks with almost no compression.  And he said he used 10wt (but it felt like he used concrete).

[Skinhead]

I use ATF.

[quexpress]

I use ATF.

Same here.

[bentwrench]

I tried the 15w with prog.springs.It was a little too firm,10w seems just right .

[98valk]

oil weights are not standard for fork oils.
http://www.peterverdone.com/archive/lowspeed.htm

I use amsoil with the progressive springs. used slightly less then book calls for per some posts. a lot smoother ride than level called for.
http://www.amsoil.com/shop/by-product/other-products/suspension-fluid/shock-therapy-suspension-fluid-10-medium/?code=STMQT-EA