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c most SEVERE service. TBUNK HSTC*. OIL FOR th^OST _ Iro-NUn Tro-Mar SR is our premium cylinder/crankcase oil for use in trunk piston engines burning residual fuel. Available in two viscosity grades (SAE 30 and 40), this 25 TBN detergent oil is noted for low ring and liner wear and clean interiors under any service conditions. Extensive experience in the medium and high speed diesel engines of all major builders has demonstrated the effectiveness of Tro-Mar SR. It combats system oil contamination and minimizes corrosive and mechanical wear. Overhaul intervals in some engines exceed 20,000 hours, without draining the oil. Tro-Mar SR is available in drums at ports around the world and in bulk at major locations. Call our service representative for more information. Exxon International Company Marine Sales Department 1251 Avenue of the Americas, New York, New York 10020 (212) 974-5216 THE SIGN OF SERVICE
