I'm posting this strictly out of curiosity. The concrete is a little bit cold this time of year but I still enjoy doing the change myself. The wheels never leave the ground when I do mine. I just roll a floor jack under the front with a block of 2X4 and raise the car up just enough to give myself a little room. Some guys with tall pick-up trucks I would imagine don't even need a jack for theirs. For me it's one of life's simple pleasures.