1938 LaSalle Production - GM Heritage Center

section constitute a classification of lubricants in terms of
fluidity, but without reference to any other properties. The
oils with the lower numbers are lighter and flowmore readily
than do the oils with the higher numbers.
The refiners or marketers supplying the oil are responsible
for the quality of the product. Their reputation is the car
owner's best assurance of quality.
The SAE viscosity numbers have been adopted by practically
all oil companies and no difficulty should be experienced
in obtaining the correct grades of lubricant.
Maintaining Oil Level
Check the oil level every time gasoline is purchased
and add oil as necessary. The oil gauge rod is marked in
quarts; add oil whenever the level falls below the 6 quart
mark, but do not add above the 7 quart mark. Always be
sure to have the right amount before starting on a long drive.
Changing Crankcase Oil
Oils have been improved greatly, driving conditions have
changed, and improvements in engines have lengthened
considerably the life of good lubricating oils. It is, however,
necessary to
changethecrankcase
oil whenever
it becomes
contaminated
with harmful
foreign materials,
to assure
continuation of
bestperformance
low maintenance
cost and long
engine life.
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