OS Giken OS-250R 80W250 LSD Gear Oil 1L
Genuine OS250R oil direct from the authorised distributor. Suits Superlocks, Hyperlocks and MFactory LSDs (not helical).
This oil gives slightly less locking than 75W140. It can be made to have slightly less locking again, with 30mL of friction modifier added.
OS Giken OS-250R oil is a full synthetic super heavy-duty oil formulated specifically for use in their Superlock series of LSD centres. It is GL-5 Rated, 80W250 grade oil.
Most differentials require two bottles of oil. This oil is very thick, and is most suited to race vehicles, where servicing occurs after only 1-3 short events, or a single endurance event. This oil needs to run hot, and does not last very long. It is used in road vehicles where differential oil change intervals are 5000km of aggressive driving.
This oil is essential for achieving maximum performance from an OS giken Superlock LSD under full race conditions, when servicing the diff oil after 2-3 races or 5 hours of race driving. This oil will not drain well if left for too long. Road vehicles require oil servicing at 5,000-10,000km intervals if the vehicle is not ever tracked.
FILLING SERVICE: To fill a differential at the workshop (between 1.01L and 2.00L oil fill), order two bottles. This includes the labour to fill the differential, clean the drain plugs, install new o-rings or washers, and re-torque the plugs. This is a flat rate to supply oil and fill the differential. We will not work out to the mL how much oil you needed.
DELIVERY: If not being used to fill a differential here, we will send 1L bottles, or the equivalent amount in an unbranded container, which is still OS250R, but it has been filled from a bulk drum instead of individual small bottles.