Having said that I once filled up all my plug holes with oil once and the car ran like shit until i figured out why!
Lmao.
I usually use Stagg welseal which is really good stuff as I don't like using sealer but found a dodd of sealer in these parts is a good idea, aswell as some sump's where they meet the crankcase at either end of the block, basically any nooks and cranny's/corners.
