Got a reman compressor, still need to buy the seals. I want to buy the dryer, oil, orifice tube, and freon all at the same time so I can take advantage of Advance's VISA promo code, but I can't seem to find information regarding how much r134a the system will take after I pull a vacuum? How many oz's should I get when I purchase the remaining items? I already plan to get 8oz of 150 PAG oil. When I swap out the compressor, dryer, and orifice tube I put the PAG oil in the compressor (turning it over to saturate it) and in the dryer, then vacuum it? The vacuum draws out moisture and such, it won't draw out the oil I just put in there will it?