I am in the process of setting up an oil change business and am interested in the Topsider you have mentioned in this forum. How long does it take to pump out 6 quarts? I am guessing that there are various brands of this contraption so can anybody here recommend the best one? I need something powerful and reliable, not a toy! (I have never actually used or even seen one) Any help from anybody would be greatly appreciated. Please respond to [email protected] if you would. Thank you. Chris from Minnesota.