How many quarts of oil will the 1980 280ZX N/A hold?

I'm getting ready to sea-foam the Crankcase, so I need to know how much to put in.

- Thanks -

ugh, is there a problem with the engine? sea foam is just a chemical thinner, might clena up some buildup but it might also promote bearing wear

and the capacity ahould be around 4 quarts, might be a little more, just buy 5 quarts and add until the dipstick says full

Capacity is 4.25 quarts with oil filter. I have a haynes manual.

Nothings wrong with the motor, I'm using it once just to clean everything inside, put on new injectors, plugs, wires, cap, rotor, coil, having the engine detailed, alluminum radiator, new intake, I also bought so Lucas Upper Cylinder Lube, gonna get this thing in tip top shape, It's finally primered, I will have pictures in my resto thread, tomorrow around Noon'ish Central Time.