I'm with Minnflyer on this. I never use it. I have pulled engines out of boxes that were sitting for decades that fired right up with great compression and not a hitch.

Besides, when and if you ever run an engine to the point of destruction.....Hey now you got a reason to go get a new one.

Life is too short to worry about such things.

I'm sure I will catch some heat on this but remember they are just toys. No way, did I really just say that.