Reply to "Car Lift Noise"

I found out these lifts can make noice on occasion from the seals in the cylender, so the guys came out and added something they call catipillar juice for lubrication, so no noise now. Also I had tilt because one of the safety/resting latch was not pulling back far enough, so the all 3 posts were lowering except for the one (not good), but that was adjusted somewhat and I need to be sure to pull back fully on the main latch to release all 4 posts. He also said not to bolt down the posts, as a little shifting is needed to even out the posts with movement going up and down. He had seen lifts where the bolts actually broke the pavement without that little ability to flex some at the bottom.