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The most fuel-efficient Diesel engine The newest 645 marine Diesel of painstaking research and innova- our Diesel engines, from General Motors' Electro- tive technological improvements And now it's here. An engine that Motive Division did not appear because of our absolute determina- is some 2.5% more fuel efficient than overnight. Emphatically not. tion, in the face of spiralingfuel our645EB.Which was 15%.more vQrhi/^0 fne»l mncnmntinn in fiipl pffiripnt t"han niir n4-r» r.A WhlCr Fluorocarbon Lower • Liner Seals Model F Crankcase Heavy Head Exhaust Valve Fire Ring Piston (turbo- charged engine; 14.5:1 compression ratio) Laser Hardened port area of Cylinder Liner 1979 Redesigned Rocking Piston Pin Increasing • Load Capacity by 50% I980 Nickel-Plated Lower Liner Insert Pre-Stressed Stainless Steel Top Ring With — Chr< inie Face and Sides 16.0:1 Compression Ratio (turbocharged engine)