Should I add a little more that 4qt of oil to my ls/vtec to make up for the external line? Does the line decrease/effect oil pressure any... maybe just enought to fill the line??? I'm using 10w 30 oil at this point with an ITR oil pump. Just getting the little issues out the way.... thanks

Also, when is it necessary to run an oil catch can between the pcv valve and the oil seperator? Does the rpm or hp play a role, or is the oil seperator adequate enough for average all motor setups? I just don't want to suck up oil.