Show SERVICE FOR OIL FILTERS IS NEED Abrasive Matter Recovered Emphasizes Necessity of Renewal Half a pint of If abrasive mutter matter taken tak- tak en from the oil by the time oil all filter liter Io to relics miles driving Ing emphasizes lZ's the necessity of motorists having ho the oil filter renewed renew every miles This amazing discovery was IoU mode made de after repented tests by research engineers engineers engi engi- who ho burned n a cloth filtering unit taken toen from nn on oil filter that had bud done service for mites miles Composition of Residue The residue c composed of ot one one- third sand and two thirds metal oxides ox oxIdes ides Wes and was of ot such a highly abra ahra abrasive sive she nature that t It could be used a aan as asan an nn effective knife sharpener While the abrasives es were trapped b by bythe bythe the oil filter before doln doing damage to cylinders pistons and ond other Internal parts PUIS of the engine engineers warn that after about miles the time filter filter- log Ing unit usually becomes so o filled that the oil filter needs servicing necessitating mating tating Installation of ot a renewal cartridge cartridge cart cart- ridge which will make the filter as asgood asgood 10 good 1 as new again Time for tor Ren Renewal wal The manufacturers manufacturers' oil changing recommendations are based d on the use usa of oC an oil all filter and that It Is being renewed renewed re re- every miles therefore ItIs It ItIs Itis Is Important that the filter Biter be serviced Iced after this mileage |