The fox suspension fork oil 10wt it is formulated using the most advanced fully synthetic base fluids to provide consistent performance throughout extreme temperature conditions the 10wt red fork oil employs a proprietary additive system that maintains a high iv and eliminates stiction friction and wear as well as protecting against foaming seal swell oxidation and corrosion the 10wt red fork oil is designed to work in fox39s fit dampers fox suspension fork oi