Greases are rated by the National Lubricating Grease Institute (NLGI).
An NLGI 2 grade is typically the specification used in automotive greases.
One of the only differences between industrial and automotive greases
is that a two-letter designation is often used in the automotive industry
to specify the type of grease to employ.
For example, greases may be rated as GC or LB.
GC is recommended for axle and wheel bearing grease,
while LB is the industry standard for chassis grease used
on tie-rod ends, ball joints, U-joints and control-arm shafts.
Regardless of the application, greases should reduce friction and wear,
protect against corrosion, seal bearings from water and contaminants, and resist leakage.
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