Show economical to use best kind of oil on tractor rapid deterioration lack of power overheating consumption of more fuel and rapid carbonizing of the cylinder are some of the inevitable results when a cheap grade of tractor oil Is used says F P W duffee of wisconsin the best oil that can be bought Is none too rood good to use in a machine working unter under extreme conditions of temperature and hearing bearing pressure the cost of lubricating oil Is a very small part of tit the total cost of operating a tractor including repairs interest Int erect on investment and depre depreciation clation the difference ference in cost between cheap oil and tit alie best oil Is in most dinst cases not more lhnn 2 or 3 per cent of the total cost of operating the machine the cheap oil will cost more in the long run ns as it will mean diore repairs and moro more trouble duffee find fandt that the recommends ions eions of nf the manufacturers r er had ad best bo be followed no as to just what oils ore are suited to luar their machines reliable manufacturers are highly interested in the lite life and satisfaction of 1 their machines and ril go to considerable expense to de determine the best oils to use |