Some of their mounts are, for example the Chevy Venture minivan uses hydraulic filled mounts.
Nowadays almost all motor mounts are fluid filled for dampening purposes.
A hydraulic motor is actuated by the hydraulic fluid which is pumped into it, and will use this fluid energy to turn a shaft or mechanical gearset, thus converting fluid energy into mechanical energy.
You can add hydraulic fluid to Porsche convertible top motor by popping open your engine hood and then pouring the hydraulic fluid into the appropriate compartment.
It is a hydraulic motor housing containing a vane that turns the shaft when hydraulic fluid is pump through the motor.
A solid mount has no play where as a hydraulic is flexible so you do not feel the torque of the motor(what you would want for daily driver in my opinion).
The 2001 Chevrolet Malibu came factory equipped with the 3100 V6 in transverse configuration. The Malibu has two hydraulic motor mounts.
A hydraulic pump will be powered by a mechanical source, such as a combustion engine or electric motor. The input shaft actuates a mechanism which pushes fluid through it, thus converting the mechanical energy into fluid energy. A hydraulic motor is powered by the flow of hydraulic fluid through it, and will use this fluid energy to power a mechanical device - typically, a shaft, thus converting fluid energy to mechanical energy.
If you can get the solid rubber ones as replacing the oil filled ones that should not be a problem for an 8 year old car. See this: http://www.aa1car.com/library/motor_mounts.htm "Replacement mounts may or many not have the same construction as the original. Fluid-filled hydro-mounts are expensive, so a more affordable alternative may be a solid replacement mount. But a solid mount obviously cannot provide the same level of dampening as the original hydro-mount. Consequently, you might not be happy with the way your car feels if a less-expensive solid mount is substituted for a fluid-filled mount."
Reduce the output flow of the pump supplying fluid to the motor
Internally, they're pretty much the same. The difference is the operation expected of it - a hydraulic pump converts mechanical energy to fluid energy, whereas a hydraulic motor converts hydraulic energy to mechanical energy.
A hydraulic pump uses an external mechanical force to pressurize the hydraulic fluid. A hydraulic motor uses the pressurized hydraulic fluid to apply a mechanical force an external machine. See the difference between a pump and a motor.
can i use power steering fluid in a top motor pump