Profile: Howell Petroleum Additives Co., Ltd. specializes in the marketing of additives for lube oil which include detergent, ashless dispersant, oxidant-corrosion inhibitor, EP antiwear, oily additive, demulsifying additive, antioxidant, metal de-activator, viscosity improver, antirust, and pour point depressant. We are an ISO 9001:2000 certified company. We also deal with fine chemicals like TMA, HCPE, THPA, and MTHPA. Our product line includes polyisobutylene monosuccinimide, polyisobutylene bissuccinimide, polyisobutylene polysuccinimide, high molecular succinimide, zinc butyl octyl dithiophosphate, secondary hydroxyl dithiophosphate, and methyl silicone oil. Our pour point depressant is used to lower freezing point. This product can improve low-temperature flowability of oil products which are mainly used in internal-combustion oil, machine oil and axle oil. Its reference dosage is 0.2%~1.0%. Detergent T104 is a low base number synthetic calcium sulfonate. This product can be used in blending various grades of lubricating oil for internal combustion engines.