PJ1 2-20W 20W Fork Tuner Oil, 0.5 L High Viscosity Index (H.V.I.) fluid specially blended with anti-foaming additives, which provide consistent fork performance superior to standard fork oil, even under severe temperature ranges PJ1 Fork Tuner special High Viscosity Index formula far exceeds all OEM specifications and noticeably increases traction and handling for a smoother ride PJ1 Fork Tuner oils will not fade, be affected by hot or cold climates or break down under extreme riding conditions Synthetic anti-seal swell additive to help keep seals soft and to guard seal from leakage Available in 8 different multi-viscosity weights, providing consistent, smooth damping action for a more precise response from the forks