I switched from Silkolene to to Maxima 85/150 Racing Fork fluid (non-Avy fork). Apparently Push switched to it after some testing according to an old 2009 MTBR post:
After using Torco Fluids for many years, our testing proved that Maxima suspension fluids were superior. We made the switch last year and haven’t looked back as it solved several issues.
Darren
As for oils, Silkolene and Bel Ray are very good products that test very well when we were comparing brands. With our “no compromise” approach, Maxima led the group. I just wish that we would’ve started testing fluids earlier than last year.
Darren
and Craig @ Avy also recommends it as a Spectro alternative.
GIYF:
http://forums.mtbr.com/shocks-suspension/alternative-fork-oil-golden-spectro-85-150-a-887972.html