Motor oil can not be compared to gun lubricants for one simple reason...It is meant to be used in HIGH VOLUMES in a CLOSED environment. You use motor oil in quart quantities at a time where you use gun lubricants in drops at a time. Even if you look at Lucas, they even say that their motor oils do not do the trick for guns and they even say that they had to redesign their products to make an oil that would actually do what it is supposed to do in a firearm. Gun lubricants have to be able to maintain lubricity, even when fouled up by firing residue and foreign debris like sand and dirt, if not repel them outright. Motor oil can not handle this kind of abuse, and it has been proven to be the case. People who promote its use even state that the only time it really is acceptable is in a clean environment where you won't be shooting much and your gun won't really be dependent on constant lubrication. Also, motor oil is not a cleaning agent, so you can not compare it to a CLP. If it was so great, why is it not what the military uses?
Comparing motor oils to CLPs is the silliest thing I have ever heard of. Again, motor oil is designed for closed environments, and it shows when the oil is exposed. It grabs onto everything around it and doesn't want to let go. This is why the oil has to be cycled through a filter as the engine is running. Its lubricity properties are only relevant and effective in high volumes where the components are submerged. This is not possible for firearms.
A CLP is a cleaner as well as a lubricant, which most of the times means that it has additives that allow it to penetrate under existing fouling and separate it from the metal surface. Aside from that, you will find that in my testing, CLP will actually prevent fouling from sticking, unlike motor oil which welcomes it.
I constantly hear people saying that they use motor oil for their guns because at least it will be there when things go bad and war breaks out. Like all the lubricants for your guns will just disappear or something. That is about as logical as saying that you will only carry a sharp stick or a rock because at least there will be plenty of those around when things go to hell. I have cleaned so many guns with my single bottle of SLIP2000 Gun Lube and still have half of my 4oz bottle left. With CLP, a little bit goes a long way, and I still have 3/4 of a gallon of Break-Free CLP after 2 years of using it on guns and everything.
Plus, let us use our thinking caps for a second. How many times do you think you will be going out and practicing shooting if things were really to go to hell in a handbag? Even if things did go bad, wouldn't you prepare by buying appropriate quantities of items as you do with other stuff as well, like food and water? Or are you also training your body to absorb the suns rays and eat dirt to prepare for the impending doom?
I do not think that you are dumb to use motor oil, but I do think that using it to lubricate a gun is pointless when there are products that last longer, and end up costing way less while being less harmful for you in the long run. I paid $10 for a product that I am still working with to clean and lubricate guns daily for about a year and a half. Seems to me that I am getting the most bang for my buck when you consider that all i have to do is add a drop or two to keep the gun lubricated and protected. But it is up to you to decide in the end. END OF RANT