What is the correct amount of oil to add to the engine of a 2000 Legacy GT after an oil and filter change?The owner's manual calls for 4.5 liters (4.75 us quarts) in the EJ25 engine,but when I add this amount,it is well above the full mark on the dipstick.This is the first Subie I have bought (recently) and am wondering if this is a common thing or could it be an incorrect dipstick?