RDK

I just bought a Massimo Buck 450 and need to do the first oil change and I am getting conflicting information on certain things. If I am seeing the owner's manual correctly it says the oil capacity is 1.48qts so, is it that or 2qts also if I read it right the 450 has no oil filter but has a screen on the drain plug. I need to do the oil change but want to get it right!