Rock Oil Synthesis 4 Winter, 4-Stroke oil

During extensive development testing, S4 has proved
to be an oil for extremes. Its wide viscosity range gives
superior protection in conditions ranging from cold
winter starts to the severe heat generated in racing
engines.
-Outstanding thermal and shear stability.
-Superb wear protection.
-Significantly reduces friction, releasing full engine power.
-Passes crucial clutch friction test required to meet the
JASO MA specification, allowing safe, predictable use in
wet clutch applications.
May be used where SAE 10W-40 is specified in
owners handbook.