SUNISO SL grades are synthetic ester lubricants, formulated using select polyolester base stocks & additives providing outstanding lubricity, stability and corrosion protection. These lubricants are miscible in alternative refrigerants such as R-134a at extremely low temperatures. SUNISO SL lubricants have been designed specifically for use in refrigerationand air conditioning systems charged with ozone friendly alternative refrigerants. A Quality product from Sunoco, Belgium.