ARE THEY NECESSARY?

Hawera Star, Volume XLV, 23 January 1926, Page 12

ARE THEY NECESSARY?

It is not suggested that drivers should run their engines for such lor g periods without (denning them out. \YIi:iI limy tie suitable for power units »f u eei tain type may not be suitable for others, and it is chiefly a question of individual experience, but that on gines during the period in question can be used with success for mileages of

25,000 or more without changes of oil.

shows that those who advocate replacing the lubricant as often as once in every .1000 miles are going to the other extreme, unless there is something radically wrong with the units in which the oil is employed or in the oil itself (although an early first change is strongly advocated, as the first supply of oil will necessarily be called upon to clean the engine after mamifaeturj and assembly). This matter is emphasised because the cost of lubricating oil is not one of the least in connection with the running of commercial motor particularly those of the heavier type. Another interesting fact that was disclosed in the case under review was that the thickness of the oil had very little effect on its lubricating properties. and one of those found most satisfactory would bo considered- by , most users to be far too thin for the large power unit. Where excessive oil is employed, this usually means excessive deposition of carbon, and, consequently, necessitates m.ire frequent, lifting of the cylinder or 1 lie cylinder heads f . clean i ng.