Ive finally got of my butt muscle and did the final things to complete a rebuild by adding all the vital fluids.My question is after adding the 1 liter of oil and running the engine i noticed the level in the sight glass is not showing oil.The book says it should be visable,i dont have any oil leaks.So is this normal and ive never paid any attention or do i need to add until the sight glass shows oil????thanks..............Paul