It is somewhat difficult to get a young engineer to understand why the
cylinder requires one grade of oil and the engine another. This is only
necessary as a matter of economy, cylinder or valve oil will do very
well on the engine, but engine oil will not do for the cylinder. And as
a less expensive oil will do for the engine we therefore use two grades
of oil.
Engine oil however should be but little lower in quality than the
cylinder oil, owing to the proximity of the bearings to the boiler, they
are at all times more or less heated, and require a much heavier oil
than a journal subject only to the heat of its own friction. The Renown
Engine Oil has the peculiarity of body or lasting qualities combined
with the fact that it does not gum on the hot iron and allows the engine
to be wiped clean.
INJECTORS
The next in the list of inquiries was for a reliable injector. I was
not surprised at this for up to a few years ago there were a great many
engines running throughout the country with only the independent or
cross-head pump, and engineers wishing to adopt the injector naturally
want the best, while others had injectors more or less unsatisfactory.
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