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Service Stations of th Vacuum Oil Company on Lake Superior. This map is one of a series. Watch for succeeding ones. Gar- goyle Marine Oils can be purchased at every im- portant Great Lakes Port. Wastetul lubrication practices disappearing on Great Lakes A little history: N the old days on the Great Lakes lard oil was used ex- tensively on engine bearings. Heavy emulsion often occurred in the wiper cups with conse- quent stopping of the oil leads. Engineers using lard oil mixed it with pure mineral oil to reduce the emulsion. At that time this was necessary. Later came the compounded marine engine oil. The practice of mixing with a mineral oil con- tinued—partly from habit, partly because engineers believed the home-made mixes were an economy. Today—the situation is entirely different. Throughout the Great Lakes engineers are using the high-grade Gargoyle Marine Oils, skilfully compounded to lubricate all machinery on shipboard without MIiXing. Gargoyle Marine Oils are more dependable than mixed oils. A mixed oil film is a weakened oil film, threatening bearing failure. GARCON Gargoyle Lubricants are already compounded to maintain an un- broken oil film under all con- ditions. Gargoyle Marine Oils are more economical than mixed oils. Mixed oils mean maximum oil consumption. Gargoyle Lubri- cants save in oil consumption. They also save in horsepower. They minimize repairs. Standardize on Gargoyle brands. A competent staf of en- gineers stands ready to recom- mend correct lubrication for your engine. Address: Vacuum Oil Company, Lakes Marine Depart- ment, 343 So. Dearborn Street, Chicago. Marine Oils — A grade for each type of service STANDARDIZED BRANDS OF OIL FOR LUBRICATION OF GREAT LAKES STEAMERS Gargoyle Voco Engine Oil No. 1 Gargoyle Cylinder Oil 600-W — Gargoyle D.T.E. Oil Light Vacuum Oil Company 4 Gargoyle Cylinder Oil M Specialists in the manufacture of Obtainable everywhere in the world. high- sate lubricants for every class of machinery. Gargoyle Fuseline Oil Medium Gargoyle Voco Cup Grease (No. 2 or No. 3) New York, U.S. A. MARINE REVIEW—May, 1927