Bharat Shell Limited offers Heavy Duty Lubricant for CNG Engines. Bharat Shell Limited supplies crude, products, chemicals and technology to public/private sector oil companies. Heavy Duty Lubricant for CNG Engines prevents ash accumulation and deposit formation. Heavy Duty Lubricant for CNG Engines is provided with the excellent protection from iron wear and deposit formation and also prevention of ash accumulation. Its brand name is Shell Rimula R2 CNG [API CF 15W40].