Life — June 6, 1918 — page 35: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

me n ent thy ie gravity. The gravity is determined by the depth laboratories and engineering di 4 oi fo whieh the Rydrometer sinks, a5 shown by, the parts of the workd. © e departments in many ed od ye i he pind with the oil Go® F. “8 -, :. if a ple. markings on the spindle oil at Go In recommending a Gargoyle Lubricant for a | |a hen han FLASH AND FIRE TESTS “yng, Cost Sycignt edt ed tl i With Gargoyle Mobiloils this situation is met by x iB ned euthe, Sah test ithe lowest tempera: a Chart of Recommendations which is shown in Ls ‘ ' ture i : w Part on this page. The oils specified for the various a od aed rst ignite but not continue to burn. If the Carson this Chart are determined snneaily tes { Prise fash test is too low, the oil will evapo ful : te ed annually by a “he { ub- rate from the cylinder walls and bear. C@¥Feful engineering analysis of each model and prc ae red vod Oil Tests Their relation to Correct Lubrication This important 8-minute talk is based on the 50 years’ world-wide experience of the Vacuum Oil Company EVERAL years ago a prominent engi- neer invented a machine to determine the comparative efficiency of lubricating oils. But one day it was found that crude kerosene oil, by this machine’s test, was the best lubricant. That ridiculous result will indicate the difficulties which science has always met in trying to judge an oil's efficiency by any- thing but the practical tests of service. VISCOSITY TEST ity is simply the technical what is popularly called But this fact must be borne in mind: Two oils which will show the same viscosity at one tempera ture will often decidedly difer in viscosity at higher or lower tem- peratures. The viscosity of Gargoyle Lubri- cants is tested at three different f temperatures — 104° — 140° and 210° F, In this test the oil is put into a tube surrounded by water or steam which is kept at the test temperature When the oil reaches the predetermined temperature, a plug in the bottom of the tube is removed. This opens a small standardized tube. The oil is then allowed to flow out of this opening into a glass receptacle of known capacity he time in seconds required by the oil to fill the con- tainer beneath, up to the standard graduation mark, is the measure of the oil's viscosity. Gargoyle Lubricants all go through the viscosity test. but the viscosity test alone cannot determine the. eff ciency of an oil. Gargoyle Lubricants possess individual characteristics as lubricants, GRAVITY TEST In this test a weighted bulb with a graduated spindle, (hydrometer) is dropped into a tube of Gu. The hydrometer floats. But its bottom Sinks to a certain depth—depending on the oil's This test is simply used to determine whether or not uniform weight per gallon is being main- tained, It is constantly used in manufacturing goyle Lubricants, ings when the normal engine heat devel ops. This would leave the friction sur- faces without lubrication. Gargoyle Lubricants always undergo this x flash test, The fire test is made with the appa ratus used in the flash test. The fire test is the temperature at which the ignited vapor from an oil will continue to burn. ‘his is another check used in manu: facturing Gargoyle Lubricants to insure uniformity, But it should be remembered that the flash and fire tests alone cannot determine an oil's lubricating efficiency, GARE 6 Nevertheless, during manufacture, cer- tain scientific tests are essential. For example: Each batch of Gargoyle Mobil- oils is put through at least 35 separate and distinct tests. These tests are not aimed to get at the lubricating efficiency of the oil. That can only be determined by the test of service. The scientific laboratory tests simply make sure that the oil is run- ning uniform. Below we outline briefly a few of the tests used for this purpose. IMPURITY AND WATER TEST Crude oil comes from the ground, It is liable to contain traces of salt, mud, sand, water and other foreign substances held in suspension _ The crude oil which is sub. jected to this test is mixed half and half with gasoline and poured into a graduated glass sedimentation jar. The jar is then put into a centrifuge and whirled. During the whirling process the bottom of the jar is thrown outward. The water and foreign substances are forced into the small, graduated end of the jar. The organic foreign substances form a layer between the water and the oil, the sand sinking to the bottom. The graduated scale indicates the percentage of water and of foreign substances in the sample under examina tion. “THE foregoing are, of course, but a few of the 35 Separate and distinct tests which are used in the manufacture of Gargoyle Mobiloils. To de- scribe all of these tests in this space would be im- possible. But we have tried to make plain the great differ- ence in efficiency which may exist between oils which look alike, feel alike and test alike. To cope with this puzzling condition, the Vacuum Oil Com- pany has for years maintained thoroughly equipped given purpose, wé first analyze the operating condi- tions to be met, then specify the lubricant which is known from practical experience to meet the con- make of car. The recommendations are based on 50 years of ractical experience in lubrication. he formule and methods used in manufacturing these oils are based on almost numberless practical tests. You may safely feel that the oil specified for your car in this Chart will insure—Greater power. Less friction. Less carbon. Lower consumption of gasoline. Less consumption of lubri- cating oil. Longer life of your car. Correct AutomobileLubrication Explanation:—The oils, foe engine h tree carbon, are: FoF: |w Pie FF S¥5F ohm: >>> SSF EE SEE FE: [weer Sinssc Eivvinai>>> >i ok: EESEEE TORR: bhaDa Hi bm> ok Sot: $8): Bods >> WORFAE FE S550 FF S57 FF r7Rt Einpot. >>> >t piotokoton> | Sa F Ex 75S ¢ E558 SESS ELT F pee Fo. okF o¥otons: oteeeht: Bio: > Soi i> >eeedod £ F kore aekt seni tii toes eo /ier a Ah ces ia F¥o: FF>. FF of fonedoot hihi b> > Foee: pi>ton: FEF pinetintiiin i> te FF Eko. >. pdo>>endodin: piv: p>: >>>>>ne phir>rt ppm >| $F ior oh ff >> pivin pom >> >>te: & Ee! Y> FE EY OS REESE EE >i >t bf >> > vam. TER Mas CO Go So Coes eee ESEE E: 8 o> Fo FokS FE bi >> Episinpeo> pivm>>m >it FRE! > Em ppoipiooioih Bi Cro i ato Yo¥ootoks > F >> tm ya>a>>t FESR Fank: ¥oFot ECTS 37537 FEE SE Fe SeeeEE ETE oom ef En >> Sot be P¥oy of ke $F SEER EE: Favs asst ¥ o¥>e> ¥ Fioperes inn: Bein te Fist toetetor RTH Series >>> grades of Gargoyle Mobit. 3 De RR Fd >>. FREE: ¥ Sm In, buying Gargoyle Mobiloils from your dealer, it is safest to purchase in original packages. Look for the red Gargoyle on'the container. If the dealer has not the grade specified for your car, he can easily secure it for you. VACUUM OIL COMPANY, New York, N. Y., U. S. A. Specialists in the manufacture of high-grade lubricants for every class of machinery. Obtainable everywhere in the world. Domestic Branches: Detroit, Boston, Kansas City, Kan., New York, Chicago, Philadelphia, Iadlanapolis. Misneapolis, Pittsburgh, Des Moines Sisit4 rertisif pres | EF re Garguyle Mobilail "A for bevel gear drive. comicbooks.com