I have the Harbor Freight pump, and am considering trying it the next time I change oil in my car. The dipstick tubing supplied with the pump is so thin I suspect it would be very slow, and is so flexible it would likely curl up within the oil pan instead of reaching all the way down to the bottom. Question: What's a more suitable type of hose that's easy to find? The dipstick tube of this car is about 7 mm inside diameter, and has a couple of smooth bends, so a rigid pipe wouldn't work. It needs to be flexible, yet stiff enough to go straight down to the bottom once it gets beyond the curves in the dipstick tube. Lowes has ¼" OD vinyl tubing that might work, but it tends to curl, too. I don't know whether it can tolerate warm oil.