Thanks for that BobJust enough to dribble out the level plug ,maybe a bit lower ,enough for the chain to pick it up if kicked over.No more if you want the clutch to free off. I buy a 1 litre bottle of very basic 20 SAE if I can find it ,lasts for years.If not then some 10/40 non synthetic dino juice. Cheapest possible.Red Rubber grease around the Rubber seal seems to hold the oil in.