I just bought a set of these bushings to replace the worn-out ones in my front stabilizer bar. The set did not include any grease or lubricant. The manufacturer doesn't state the construction material, but they smell like tires/rubber.
Do they need to be lubricated before installation? If so, what type of lubricant should I use?
In the seldom cases I saw them the manual advised to use soapy water to install them as petroleum based lubes degrade rubber. Normally grease is included on items that need it. Make sure to torque down the bushings carrier as the stabilizer bar is in the "work" position, that is the position the stabilizer bar has when the loaded (normally only the driver) vehicle rests on the wheels.