Don't ever run an engine dry. Would you drain the oil out of your car and run it dry? Thats what you are doing. There are many schools of thought on this, but I have 35 years of exp not running them dry and still have some of my first engines. The friends who run them dry and use after run, replace engines because they fail. Its not the best thing to do, but thats just my opinion.

The oil in the fuel keeps it lubricated and the nitro evaporates very fast. If you are going to store it for long periods or you live in certain high moisture spots, then lube it good after you fly it.

Many will argue, but nothing can change the facts here.