This special 80w250 gear oil was formulated for LSD differentials by OS Giken research labs. 

• The OS25R gear lube outlasts everything else on the market and provides the ultimate protection under racing conditions.
• Our customers report "No other oils seem to last as long before the diff starts making noise after coming in the pit after a session on the track.
• Another customer says, "While it is more expensive it protects the LSD better and longer than other brands."
• OTHER BRAND MEANS " REDLINE 75w40 NS"