Cost is a quality just as are physical characteristics, and by discussing it immediately following characteristics, the reader will have in mind all of the requirements of gear oils and can thus visualize the fact that considerable effort and precise compounding goes into the manufacture of a satisfactory lubricant.
At one time gear oils consisted, in the main, of black oils which were not too well refined. While some residual products are now sold for the purpose, most gear lubricants are on par with motor oils in quality and price. As further demands are made on gear lubricants for specific applications, more expensive additives and even synthetic fluids will be required in some cases. Thus, the trend of cost of such products can be expected to increase to some extent. In return, the consumer will obtain a better product and in many cases a longer service life.
It is appropriate, when considering the cost of a lubricant, to also keep in mind the cost of the equipment to be serviced. The proper lubricant, applied as needed in the right amount, will protect and prolong the life of machinery many years.
