Scope Centex Marine Engine Oil 6 TBN & 9 TBN Scope Centex Marine Engine Oil 12 TBN & 15 TBN CENTEX Heavy Duty Marine Engine Oil SCOPE Centex Marine System oil is premium quality lubricant for cross head diesel engine crank case system. It is especially effective in highly rated cross head engines with oil cooled pistons, power take- off (PTO) gear applications. Main Benefits Good Alkinity Excellent resistance to corrosion. Excellent detergency keeps crankcase and under piston spaces clean. Good oxidation stability. Application SCOPE Centex Marine system oil of 6 TBN & 9 TBN can be used for crank case lubrication of high power low speed cross head marine diesel engines. It can be used in stationery diesel engines for power generation and reduction gear boxes.