Fork oil

Well...to answer my own question, it's the anti foaming additives in hydraulic oil. They can cause seal failure in a jack and I assume fork tubes.

Standard weight motor oil will work fine in a jack or tubes though. I just need to find some 15w oil now.
 
Hi guys just tested jack oil and fork oil ,The closest weight to fork oil is 10wt , so any 10 weight motorcycle fork oil should work great .... Bill Green (used paint meter and watch)
 
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