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• Mobil Product Data Sheet Mobil°Pegasus°80; 80 Super Gas Engine Oils Description Mobil Pegasus 80 and Mobil Pegasus 80 Super gas engine oils are made from the highest quality se- lected base stocks to provide excel- lent oxidation, nitration, and thermal stability, reduced levels of carbon and sludge formation, and longer oil and filter life. The products have su- perior resistance to foaming, exhibit good demulsibility, and provide pro- tection against corrosion. The advanced additive technology in Mobil Pegasus 80 and 80 Super is a medium -ash level which exhibits high -ash performance characteris- tics. Mobil Pegasus 80 Series, there- fore, offers outstanding varve face and seat protection, optimized engine cleanliness, and control of deposit formation. The additive system also provides protection against piston scuffing, scoring, and cylinder wear. Application Mobil Pegasus 80 is designed to provide the highest level of perfor- mance and protection in Caterpillar, Superior, Waukesha, and other tur- bocharged and naturally aspirated, medium- to high-speed, four-cycle gas engines requiring a medium -ash - level product. It minimizes ash de- posits in cooler -combustion, lean -burn engines and in stoichio- metric engines showing higher levels of oil consumption. With its low lev- els of zinc and phosphorus, Mobil Pegasus 80 also can be used in en- gines equipped with catalytic convert- ers requiring medium ash oils. Mobil Pegasus 80 can be used in gas engines when alternate energy sources for fuel gas contain low lev- els of chlorine and sulfur compounds. When sour gas is used as en. JW fuel, a gas engine lubricant with high- er reserve alkalinity may be required. Consult your Mobil technical repre- sentative for additional information on lubricant selection and oil -change frequencies. Mobil Pegasus 80 Super can be used in all the applications described for Mobil Pegasus 80. It is properly applied in four-cycle, medium- and high-speed engines which must start in cold environments. Where superior high-temperature performance must be combined with excellent low-tem- perature oil flow, Mobil Pegasus 80 Super is the best choice for long en- gine life. Advantages When used as recommended, Mobil Pegasus 80 Series gas engine oils provide the following advantages and benefits: — Excellent valve guide face and seat protection — Maximum protection against pis- ton scuffing, scoring, and cylin- der liner wear — Improved engine cleanliness — Minimum ash deposits in lean - burn and high -oil -consumption gas engines — Excellent foam and corrosion re- sistance — Excellent TBN retention — Excellent resistance to oxidation and nitration — Excellent wide -temperature per- formance with Mobil Pegasus 80 Super • PDS 1-70 Mobil Pegasus 80 Mobil Pegasus 80 Super Product Number 60677-4 60574-1 SAE Number 40 15W-40 Gravity, API 28.0 30.5 Color, ASTM D 1500 5.0 3.0 Pour Point, OC(OF), max -15(+5) -40(-40) Flash Point, OC(OF), min 238 (460) 218 (425) Viscosity, cSt at 400C cSt at 100OC SUS at 100OF SUS at 210'F 121 13 630 72 111 14.7 575 80 Viscosity Index, min 95 137 Sulfated Ash, wt % 0.48 0.48 TBN, ASTM D 2896 5.3 5.5 CCR, wt % (base stock only) .04 0.04 • PDS 1-70