Actually where i park the bike is over carpet in the garage so you cant see any oil, second there was no visible oil leaking from the drain plug because i did look at it and third i was told it was probably residual twice. NO i did not attempt to tighten the drain plug but if they are loose they will usually have drops of oil on them and oil splatter all over the place. As far as not being a good mechanic i be willing to bet i could run circles around you on 95% of all cars.