WELCO TITANIUM SERIES grades are recommended for new BS VI compliant geared premium multigrade Petrol, Diesel & CNG Engine Oil. WELCO TITANIUM SERIES 20W40 is recommended by WELCO for use in all naturally aspirated engines fitted in passenger car, trucks, tractors, buses, goods carrier (LCVs), off highway equipment, 3-wheelers, pump set, genset and other vehicles.