Just purchased a 1998 FLHTCU/I with a Champion trike kit. It has a MERCH Performance oil filter. Drained oil, cleaned filter and put 3 quarts oil in. It reads full on the cold dipstick mark(it's cold). Manual says check level on jiffy stand. Since I can't so that where should my oil level read? Owners manual says 3 quart capacity. Service manual says 4 quart capacity. I always used 4 quarts in my Shovels. Any body have the answer?