In the automotive field,
silicone grease is typically used as a lubricant for
brake components since it is stable at high temperatures, is not water-soluble and is far less likely than other lubricants to foul.
Automotive spark plug wires are often insulated by multiple layers of silicone to prevent sparks from jumping to adjacent wires, causing misfires.
Silicone tubing is sometimes used in automotive intake systems (especially for engines with
forced-induction).
Sheet silicone is used to manufacture
gaskets used in
automotive engines,
transmissions and other applications.