1 liter jug of MOTUL is our favorite brand of fork oil. This is a 100% synthetic ester based fluid reinforced with anti-friction additives, provides consistent suspension protection for safer and more precise handling. Its anti-foam, anti-corrosion and high viscosity index protects and preserves seals while guarding against wear and tear. This is medium 10 wt oil and is the PERFECT fluid for our 38mm Marzocchi and Ceriani forks, especially when using our Works Performance fork spring kit or our complete suspension package.