New Jags

Never never. never spray silicone lubricant on anything in the engine compartment. The slightest bit of silicone will permanently damage the oxygen sensors. Instead, use an oil-based spray lubricant such as WD-40 to lubricate throttle linkage. This tip pertains to any car with oxygen sensors.

Ron Klein, Delaware Valley Jaguar Club

 

Ed note:  WD-40 is a temporary lubricant.  Use something that is permanent, but doesn't contain silicone.  Silicone also makes it impossible to touch up the paint.