Finish line shock oil 16oz a premium suspension oil formulated specifically for oil damped forks the semi synthetic formulation will not thicken or thin due to changes in temperature the low foam technology delivers consistent and predictable damping in all riding conditions you can speed up or slow down your forks compression and rebound characteristics by changing the oil viscosity 25wt is lighterthinnerfaster and better suited to lightweightthinner riders 150wt is heavier