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Show oil am ie CHANGED OFTEN Federal Company Starts Campaign Among Motor Truck Owners. A CMTipa.srn to call ati-ntion to the nc";esity of t:iianiiig oil in moiur-s tvery '0 many iiundrfi miUfa lias heen ado-c;Ucd ado-c;Ucd ij- M. L. I-'uK'l'icr, v:t-i nre.ocnt and y fneral nianagnr of iJu- j "euera.1 Motor Trut'-'lv oonpin, actordiiifc; lo infornmtion reoci"ci V ihc Siivasi; Mulor company. Salt, LnUe di.iribiHor of t' o Kedt-ral and Co:nii-cif-: iruf-Us. Tile 1'aiJurc to oha:n?c oil fi C'jomly if iid to bo t'nc main caui-c ;" driL'rioi'ation of motors. .Mr. I'nl'icr pointH out tl.at thorc so much Urroat ne in -gasoline today tiiat it has a icndt'nc' to run down past, the I piston?, pr-t into the lubricating oil and thin it. The kerosene euia the thin 1'iim of oil on th-: wearing surfjicc of the piston. pis-ton. piston rings and eylhulcr wlls. V.'it!) tho filin of oil on I .il- vtaring Dans uf i i i c motor broUen. friction, the ijiigbf-ar of motor efficiency, starts in. Tne pistons vo"k up and dow n through broken films of oil in a iin'ricating substance- that has )o.st considerable of its richness and tliifkn-'-'3. Tli ere is liitle chance of changing the qualiiv of the gasi!;.-;-. Therfi'ore. .to prolong pro-long tho 1 ii o of tlie motor the only tiling to do is ;.o change the limricatiug oil i're-rpicut'iy, i're-rpicut'iy, posiltly every 50 't to 1 "uO miles. i;e ad'0':atcs. A n e peri men t witnessed by VI r. Pul-ciicr Pul-ciicr rucentl is instanced by him-as proof that it is the nonlubricating dualities of the oil that damages motors. A mo '.or v as broug ht into a shop wilii almost .ul-j inches wear. Tiic motor vas ground to .n:.'0 inches overside, fitted with new pi '.-ton-'., put on t h bloc!: and filled with aocd, clean oil. The motor was then run continuously for sixty hum's arid dur-iu dur-iu this time the oil was c'. ranged three times. Win. n lie motor was taken down it showed no wear. The mo lor way again put t.r,et iier, oil was taken from an old truck :ind the motor mo-tor put through the same sixty-hour ts' without any change of oil. U showed .'."lTi inches wean, indicating that It ip tli nonlubricating qualities of the oil result-in result-in sr from t lie kerosene working past the uistons and mixing with il that cause the deterioration of motors. The age of a motor may almost be said to depend upon t'n number of times the oil is changed in it. |