Read the reviews, did as suggested. After driving the car at 70mph for a half hour I came home and immediately inserted the tube, left the oil cap off and pumped up the unit as directed and the oil started flowing. Looks great, It works!?! After about an hour the oil is now cold and we're still only only about 1.5 litres along. So much for warming it up. Day 2 and we're still trying to get the last 2 quarts out of the engine. Yes it works, but very slowly, especially for 5w-30 synthetic oil. 20 minutes to do an oil change as one review suggested? Maybe on a lawnmower! Used by a professional mechanic? Not on the job or they'd be unemployed!