Pro: works if you are lucky.
Con: many ways to kill and none available to fix. expensive if broken. many cheaper alternatives.

I used this to change my wife's oil (ML430) has an oil filter on top and you can feed this down the dip stick to suck out the oil. I also used this to suck out power steering fluid and tranny fluid in my truck. You MUST warm up your engine so the oil is thin enough for this to work. This IS big enough to suck up all the oil from the ML (which has 8.5 quarts). The problem is that if you do get all the oil into this thing, then HOW do you get it out if the oil has cooled? I'll tell you how. By putting too much pressure, you'll blow a seal and leak oil EVERYWHERE. It will stink up your garage, make a mess and it will do it when you aren't around. Do yourself a favor. Get a marine oil sucker (battery powered). I've used it to suck wife's oil straight from engine into an oil transport container, which I can dump directly into the recycling thing at the auto parts store. Not all this manual pumping garbage.
Pro: works if you are lucky. Con: many ways to kill and none available to fix. expensive if broken. many cheaper alternatives. I used this to change my wife's oil (ML430) has an oil filter on top and you can feed this down the dip stick to suck out the oil. I also used this to suck out power steering fluid and tranny fluid in my truck. You MUST warm up your engine so the oil is thin enough for this to work. This IS big enough to suck up all the oil from the ML (which has 8. 5 quarts). The problem is that if you do get all the oil into this thing, then HOW do you get it out if the oil has cooled? I'll tell you how. By putting too much pressure, you'll blow a seal and leak oil EVERYWHERE. It will stink up your garage, make a mess and it will do it when you aren't around. Do yourself a favor. Get a marine oil sucker (battery powered). I've used it to suck wife's oil straight from engine into an oil transport container, which I can dump directly into the recycling thing at the auto parts store. Not all this manual pumping garbage.