The old Hoppe's #9 had benzene in it. The EPA has decided its a carcinogen so its bad. I still have some in a quart bottle, nicely sealed. The word of the day is waste not, want not. Or the old Brylcream ad, a little dab'll do you. I don't soak my guns in Hoppe's. I use it freely on the bore because I like bright green patches. Drippin it all over solves nothing. Like others, I transfer to a smaller bottle to use it. I also like the clear stuff I find from time to time. Its powder solvent and has no ammonia to scavenge copper fouling. I wish I could still find the old cans of military solvent, the stuff that told you not to drink it. Causes death and its going to be painful all the while. I never was big on CLP for the bore and powder removal. Maybe others are better at it than I am. I do like Collectors CLP.
A trick my now deceased gun show partner taught me was the CLP and shaving brush. John liked engraved guns. So he had a little trick with the stuff. He wasn't shy about putting some on his guns, but then he'd smear it all over the engraving with an old soft shaving brush. I use a camel hair brush because its cheaper and I've got one handy. The idea is to make sure some of it gets in all the cuts, and then in hard to reach places like the junction of the barrel and frame, or under the extractor. I guess he just didn't want his high dollar guns to rust up.
But Hoppe's is a cleaning agent, not an oil (they do make oil). For spray oil in warm weather I like Remoil. No real reason why, maybe its the only good product that company still produces. Who knows.