I didn't really think what type of fuel you used made any difference.

Anyway, all of the engines I have are less than two years old, so I'm not an authority on engine life. I won't use after run oil unless I store an engine or I know I won't use it for a few weeks. I will empty the tank, but I don't run the rest of the fuel out of the engine at the end of the day.

I think a lot of the problems people run into is what you will or won't do when you store an engine. Lots of practices used for storage of an engine have been taken for gospel and used after every time you get done flying. There are those who will fly once a month and then put up thier stuff for a while. Those people should probably use all the steps when they get done. Someone who flies almost every weekend probably could get away with not doing as much. I think the damage happens when an engine sits for a long period of time with no precautions taken before the down time. Just my opinion.