As a driver, I drive six hours a day, so my car often needs to be pumped up. I found this air compressor at Revain. It's small, portable, and easy to use with common sense. I tried that several times and it only took me eight minutes to fill all four tires. It fits me. I have a feeling if you have an old car that needs a lot of pumping up I recommend buying it just in case the tires suddenly go flat!