Awesome pump.  I tried two other cheap pumps (under $15) and either the hose was too big to fit down the dip stick tube or it did not have enough suction to get the oil flowing.  I used this pump on a Sea Doo jet ski and it worked perfect.  The hose was long enough to put all the way down the dip stick tube and still be able to place the canister on the ground.  I pumped the handle about 12 times and the oil started flowing down the tube.  Because I had already removed the battery, I was unable to start the jet ski and get the oil warm.  I store the jet ski in our garage over the Winter, so the temperature was about 50 degrees.  Because the oil was thick, it was not flowing very fast.  I walked away that night and came back the next morning and the canister was full.  Ive read other reviews on other pumps where you have to pump the whole time to get the oil to keep flowing..not with this pump.  Very easy to assemble and even easier to use. Loved it!!!!