I just purchased this oil extractor off Amazon... http://www.amazon.com/gp/product/B000GU0MMU/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 . I plan on using it to do a "suck" and fill on the Buick in my sig. I had the pan dropped and filter replaced about a week ago. The fluid went from being light brown to having a red tinge to it. So, if I shove this down the fill tube, how much fluid should I expect to pump out? I am going to have 2 gallons of MaxLife waiting to go in, should that be enough? Also, when I looked at the paperwork from the shop it said they used Castrol Multi Vehicle ATF, is that any good and will they mix together ok? I am looking to get smoother shifts out of it. It shifts alright cold but when it warms up it gets a bit rougher. The pan drop seemed to help initially but wore off a bit, still better than it was when we got it though. Hoping this machine will work, seems all to easy.