That scissors jack is only meant to allow you to change a flat tire. You
really
shouldn't use it to raise the car for other maintenance purposes. Get
yourself
a regular floor jack and use it at the designated jacking points (usually
the
center of the front crossmember or the center of the rear differential).

A hydraulic jack doesn't have a large enough saddle to spread the load as
you lift the car. You risk collapsing the pinch weld at the scissors jack
point
or bending that part of unibody frame.

Bob