EMPEX LSA 2871 Lead substitute - Potassium Sulfonate 4.5% K FUNCTIONS : Lead substitute in lead free petrol to protect valve seats in older cars. Maintains optimal engine compression. TECHNICAL DATA : Specific gravity : 0,891 Viscosity at 40°C : 24 cst Potassium Content: 4,5% wt Base number 5 mg KOH/g DOSAGE : 225 PPM wt/wt