A/C recharge Ram Charger

after causeing a leak on my a/c hose I'm recaharging my a/c sys this week and have a ? how do i know if i have enough comp. oil in the sys?
I pushed on the hose and cracked it and it slowy leaked the 134r out so now I'm replacing the hose and will pull a vac on the sys after i install new hose. also will the vac pump pull all the oil out of the comp when i reach 15 in of vac. or will the remaing oil stay in the comp. ??? thanks paul

When the freon escapes, the oil goes with it. I always add about 4 oz. of oil to the compressor inlet before I add gas.