I've been lubricating all of my firearms with Mobil 1 20W-50 for quite some time now with very good results. Lately I've been thinking if there was something better for my AR-15's? I don't use CLP of any kind on any firearm. I've found any product that does a lot of things at once, (Cleans, Lubricates, Protects), usually does none of them that well. There have been a lot of articles written lately about how the AR-15 / M-16 platform of rifles should be run "dripping" with lube. I tend to agree. I'm thinking of switching to a heavier weight oil like straight 60W or higher for this purpose. I live in Phoenix, Arizona and we don't get a lot of cold days, but do get a lot of very hot ones! What do you guys lube your AR-15's with in very warm climates? Bill T.