Is there some specific fluid for treating the inside of the barrel, as well as piston chamber and valve? I'm not interested in "dieseling", just ensuring long life time. For those not familiar with "dieseling": If a few drops of diesel or even some oils are dropped into the piston chamber, the high pressures of the piston firing causes the diesel to act in explosive manner. In addition to the wind force, this propels the pellet even faster out of the barrel. BUt it's likely to damage the valve sooner or later.