affect many types of plastic.
Grease is a mixture of oil and a stiffener chemically known as a soap. The soap portion of any grease is basically inert and has no function other than to contain and slowly dispense the oil. Soaps are based on any of the alkali metals, so there are calcium, sodium, and lithium soaps. Being basically intert, none of them attack plastics or anything else.
The oil portion of a grease can be any liquid with lubricating properties, but the only ones that are at all common are the petroleum oils and the silicone oils. The vast majority of greases sold are based on petroleum oils. Silicone greases are generally recommended for rather special applications and are seldom sold for applications like cars.
So most lithium greases are also petroleum greases.
A more complete explanation of the nature of greases can be found in "The Machinery's Handbook."
------------------------------------------------ Jim Adney snipped-for-privacy@vwtype3.org Madison, WI 53711 USA
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