For normal temperatures, for cleaning, lubing, and protecting firearms I use Gunzilla. It is made of organic plant oils and it works better than anything else I have ever used. I was turned on to it by a friend whose last assignment in the Marine Corps was to Iraq at the start of the occupation there. He reported aboard, and his platoon sergeant took his orders, shook his hand, then handed him a pint bottle of Gunzilla. When my friend asked the gunny what it was, stripped of the profanity and pejoratives the gunny said, "It's the only thing I've found in 24 years in the Corps that gets an M-16 or an M-14 to perform the way Colt claims it should - and really doesn't."
The usual practice in the Sandbox was for a patrol to clean their rifles before they went out, and at every rest break half the platoon would clean their rifles again to be sure they would work if necessary (no guarantee with a Poodle Shooter). My friend's outfit didn't do that. They would detail-strip and clean their rifles with Gunzilla before they went on patrol, and again when they got back. That's all. The guys with the machine guns did the same.
In a year of duty in Iraq, that platoon did not have a single weapons malfunction. That gunny used his own money to buy Gunzilla by the case, because it bloody well WORKS.
Hey - if it's good enough for Marine combat infantrymen whose lives depend on their weapons, it's good enough for me. I have never had an instance where a firearm cleaned, lubed, and protected by Gunzilla failed to shoot.
Gunzilla will pull gunk, copper, and grime out of a firearm you'd swear was clean. You want proof of this? Buy yourself one of the little 2 ounce tryout bottles you can get from Top Duck, the manufacturer. Clean your firearm as you do normally. When you are satisfied it is clean, take a patch, soak it with Gunzilla, and run it through the bore. The amount of gunk, guck, powder residue, rust, and plain old dirt that patch will pick up will astonish you. I suspect your reaction will be to immediately order a pint of Gunzilla and then clean the daylights out of all your guns as soon as you get it. I use it for everything that most people use 3 In 1 Oil for, and it works better. Much better.
Top Duck also makes Copperzilla, specifically for removing copper fouling; and Superzilla, a rust penetrator and remover that makes WD-40 or Kroil Oil look pathetic. If you watch late night TV, you may have seen ads for Superzilla. I can testify that Superzilla does amazing things. I once had to deal with a lug nut on my wife's car that I could not get to budge with the lug wrench; it was rusted in place. I squirted Superzilla on it and waited 15 minutes, then tried again. The lug nut came right off. It also will dissolve paint. I used it to salvage some ceramic tiles she had put on a wooden storage box which she had not taken care of and which had fallen apart because she did not take care of it. It can be used to get stickers and bumper stickers off cars. Lots of other uses. It's great stuff.
And the beauty of Top Duck products is that they are made from organic plant oils, so they are a renewable resource. It's interesting when you have the opportunity to lay that on the liberals!