Best Gun Oil, Protecting and Cleaning Firearms

Between myself, my friends, my brothers (and I’ve got a lot of brothers), we’ve tried all common gun oils, solvents, and cleaners.  Personally, I’ve spent half a week researching gun oils.  Here’s what I’ve found.

 According to a legitimate comprehensive testing of over 40 different gun oils, Hornady One Shot, Frog Lube, and WD-40 Specialist best prevent rust. Hoppe’s NO.9 Gun Oil and Frog Lube are among the best lubricants. Full synthetic oils will perform more consistently in extreme cold.

   In the U.S., there are over 50 commonly used oils for guns.Is your gun oil the best option? What works, what doesn’t, and what’s the best option without costing an arm or a leg?  

What is the Best Gun oil?

   The internet is truly a sweet place sometimes.  A few years ago, I stumbled on a thread in a forum where a guy tested 46 different gun oils on steel for corrosion (rust) resistance.  If you want to look at his exact results and reporting, it can be found at .

   It’s an old archived page and the photos might not work well, but if you are a technical person, you’ll enjoy it.  basically, he applied the products to steel plates and left them in the elements, in a semi-controlled situation, for several days.  One series of test included salt water spray to speed up corrosion.

   The tests ran by DIY_guy showed some variation, but the same oils came out on top in every test.  Those three were WD-40 Specialist, Hornady One Shot, and Frog Lube.  Honestly, I’ve never used any of those.  They do seem to keep a moisture barrier on metal longer than other oils.

   The performance of gun oil is ranked on two primary categories: Corrosion inhibition, and how well it functions as a lubricant.  It sounds simple, but there’s a lot that goes into the testing of those qualities. Anecdotal evidence (user experience) is one way they are tested, and it should not be discounted.

    Still, a test done as a side by side comparison of different oils in the exact same environment is the only way to determine which one actually functions better, and if it’s a difference that will actually matter for gun owners.  I’ve done some testing myself, But I’m no lab technician.

 WD-40 Specialist and Hornady One Shot go on like any regular oil, just wipe it on and you’re good to go.  The Frog Lube isn’t so simple.  Propper application of Frog Lube requires a direct heat source. Either a heat gun or a hair dryer seems to work fine.

    You’re supposed to heat your gun up during application to help it thin out and penetrate. The surface of metal.  That’s the main reason I don’t like it.  I don’t extra steps.  Frog Lube is technically a CLP, while the other ones are only oils. They all have their pros and cons.

   A common complain about Frog Lube is its tendency to make your guns feel sticky.  If used too heavily, your gun may not operate well. keep it thin.

   They’re a bit on the expensive side, so poor ol’ me hasn’t felt overly inclined to splurge on them yet. Plus, I’m still waiting for my old can of 3in1 oil to run out. But judging on how the 3in1 functioned in the test, and on the small rust spots on all my guns (which I oil after each use), I should just bite the bullet.

Best Gun Oil for Lubrication

In similarly structures tests for lubricity ,maybe done by the same guy (I can’t remember), frog lube came out as the best lubricity, the slipperiest, in standard weather conditions. Frog Lube has almost a cult-like following in the gun community, but so does everything else really.

   In a firearm, lubricating oil has to withstand pressure, heat, and not dry out. Lubricating oil not only keeps moving parts from having too much friction, it also cleans them from coarse debris.  A bit of oil helps to displace crud between moving parts. That’s why a quick application usually frees up dirty parts.

   In choosing the best lubricating oil, we don’t simply want the slipperiest. Honestly, that can almost be a bad thing. What we want is consistency. The best gun oil for moving parts would not dry, and is stable in extreme weather. Quite a few will get loose as water in Texas heat, and gel up in Michigan winters.

   Most gun oils or machine oils will do fine if you are not in an extremely cold situation.  They all work about the same. Put it on the gun, watch the gun work. I’ve got a little jingle I use to teach new people how to oil their gun: “Wipe on, wipe off, leave just a little”.

   That’s how to do it.  The proper way to lubricate *almost* any gun is to wipe it on with an oiled rag, then wipe it off with a clean, dry rag.  That way, you’ll have lubricated surfaces and you will avoid making things sticky with too much oil.  Actually, it’s slipperier applied this way.

  I have personally had 3in1 and Rem oil gel up on cold winter days. They turned into a thick grease somewhere under -10 degrees Fahrenheit during one of our Arctic Clippers (a really cold windy storm).  Many guns won’t operate well with a gelled-up oil.

  Semi-autos may not return to battery after being fired. It may not feed at all.  That’s kinda bad. If applied thinly, as stated above, you will stand less of a chance of cold oil bogging down your action or trigger.  Remember, “Wipe on, wipe off, leave just a little”.

   The best oils for extreme cold weather use are fully synthetic oils.  Synthetic oils are purer than standard petroleum oils, and they are much more stable in ridiculously harsh winter weather.  They are more expensive, but they are much more stable, thus dependable, in all conditions.

What are Poor Gun Oils?

   Honestly, most any oil will work to prevent rust, sort of, for a while. Some of them don’t do it nearly as well or for as long.  herein lies the problem: Oil naturally floats on water.  basically, a lot of oils will eventually float up and run away if exposed to rain.

   Some oils are more volatile, meaning at least part of it will tend to evaporate, leaving less than you started. That doesn’t leave enough left to have a solid moisture barrier on your steel gun barrel.  Regular WD-40 is an example. It tends to dry out after a few weeks, leaving very little oil.

   If an oil tends to dry out, it usually makes a mess too.  Not everything will evaporate away. Some petroleum remnants, as well as all the impurities will remain. When you notice it’s dry and add more, it will be thicker because of the leftover gunk. 

   As more fresh oil is added and evaporated, the remnants start to add up and build up a nasty gummy layer that will hold onto dirt and carbon dust from the burning gunpowder. That’s one of the common reasons that old guns have trigger problems. For the record, regular cleaning will prevent that.

   Like I said, I’m trying to use up my 3in1 oil.  But 3in1 tends to dry out a bit.  That’s probably why my guns have little rust specks here and there. Don’t fret, I don’t have any beauty queens in my gun safe anyway. My guns are like work horses. 3in1 works as long as I clean and reapply often.

   However, nearing -20 degrees Fahrenheit, it’s pretty solid.  Thanks to a guy in Alaska for telling me that number. For most people won’t find themselves in that weather, you have many more choices in functional gun oils. I almost envy you, except that I love the frigid temperatures so.

Cheap Gun Oils that still Work Great

   In all sincerity, if you just clean it after each use, and keep the surfaces oiled, you can probably use just about any oil.  Actually, there’s an interesting note on that.  The ArmaLite rifle company (think designer of the AR-15), put out an official bulletin on the use of chap, non-conventional gun oils.

    In Technical Bulletin 64, ArmaLite addressed a concern about their rifles.  They found out that in several poorer countries, military, security, and law enforcement officers were often using common lard or vegetable oils to clean, lubricate, and prevent rust on ArmaLite AR rifles.

   Probably the worst oil you can use in a rifle is vegetable oil. It dries/gels up with heat or age.  Good for hash browns, bad for guns.  The technicians set out to find cheap, commonly available cleaning and lubricating agents that can be found in most countries.

This Is Really Cool:

   They determined that Automatic Transmission Fluid (ATF) was a surprisingly good cleaner and an acceptable as a lubricant and rust protectant. The official statement was “ATF performs admirably as a carbon remover, and protects steel surfaces excellently”.

   They also determined that any 20-weight engine oil as a preferred cheap option for lubricant and rust prevention.  The official statement is for any full synthetic 20 weight engine oil.  Remember, synthetic is more stable than conventional oil. 

   They went further to recommend Mobile One full synthetic oil in 20-weight.  That’s any 20W- Mobile One synthetic. That specific brand was recommended mainly because it has been used by some in the U.S. Army since it first came out.  It was actually recommended to ArmaLite by a U.S. military official.

Side Note,

 For what it’s worth, Mobil One Synthetic 20 weight oil will probably freeze into

 a thick glue-like substance at -65 degrees Fahrenheit.  Thanks again guy from Alaska.

Does Gun Oil Clean Guns?

   While some oils can have cleaning capacities, like citrus oil, most do not.  Any product strictly labeled “oil” or “gun oil” will not have any suitable cleaning properties. There are three different substances in guns that needs to be cleaned.  Carbon fouling, copper, and lead. Some bullets are jacketed with brass, so that too, I guess.

    The metals usually require an ammonia to dissolve them out of the barrel.  For the carbon build up, generally, a volatile, penetrating oil product, like kerosene works best.  The best for carbon seems to be a thin oil-based solvent. I suppose citrus oil may actually work there, if you don’t mind your gun smelling fruity.

   Most of the oils are not solvents, either for metal or for burnt gunpowder carbon gunk.  Some oil-based products are superb solvents for powder/carbon fouling. Some that come to mind are gasoline, kerosene, and high-grade diesel fuel (not the gas station stuff).

  Gasoline is too toxic and volatile, not to mention explosive, for use.  Kerosene on the other hand, is very flammable, but not explosive. Kerosene itself isn’t a bad option as a cleaner. That’s why HOPPE’S Bore Cleaner is mostly Kerosene. Technically though, Kerosene isn’t used as an oil.

   It’s a poor lubricator, because it evaporates within a few minutes. That’s Why if you use Hoppe’s Bore cleaner, you also need an oil. CLP products are mostly oils, and will lubricate things well enough to maintain function.  They just don’t clean things very well. remember, Frog Lube is a CLP.

 If you are using a regular oil to clean your gun, you’re gonna need to do a lot of scrubbing. If you have a good bore brush, you can eventually get the barrel clean from carbon using only oil, it may take two hours though.  in that case, the oil isn’t doing it, the brush is. If you only have patches, you’re screwed.

   An oil will not get metal deposits out of a barrel.  Granted, metal fouling isn’t usually a noticeable problem for many people, but if it’s there, you need a cleaner containing ammonia.

What’s the best Gun Cleaners?

   the most popular gun cleaners, or, bore solvents, are: HOPPE’S NO.9 Bore Cleaner, CLP, and Ballistol. Honestly, the worst in the group is usually the standard CLP.  CLP stands for Clean, Lube, Protect.  That’s the general issue do-all gun fluid in the U.S. military. 

   It isn’t super great at any one thing, but a middle of the road performer in all lubrication, rust prevention, and cleaning carbon. It doesn’t touch copper or lead fouling. In fact, the army has stated that with exception for snipers, metal fouling shows no noticeable issues.

  Remember, that’s from an organization that accepts a 6-inch group at 30 meters as baseline accuracy. I know that super accuracy isn’t needed if you can just call in a helicopter or missile strike, but I require better for a basic rifleman in my group. We also keep our barrels copper free.

Tip for cleaning your guns,

Clean your guns like you clean your butt.

Wipe it down after each use, and give it a good scrub once in a while.

(hey, it’s a perfect illustration, and you’re not likely to forget it.)

   Moving on, Balistol.  Balistol was first concocted by some German fellows in 1905.  It was issued to the German army in both World Wars.  It is also a do-all gun fluid. However, it’s much better at removing lead and somewhat better at removing copper from a barrel. It’s also great at removing carbon.

  The old time favorite in the group is HOPPE’S NO.9 Bore Cleaner.  Some smart guy came up with a mix of 9 different chemicals including ammonia, kerosene, and alcohol. It was invented in 1903. I’m sure the recipe has changed a little since the beginning, but it’s still got kerosene, ammonia, and several alcohols.

  HOPPE’S is the best of the Standard gun cleaners when it comes to getting rid of lead or copper fouling. It’s also about as good as it gets at penetrating and dissolving through carbon buildup.  Because it contains Kerosene and alcohols, it’s very flammable, which is probably why he military never used it.

   I’m a proud 3rd Generation HOPPE’S guy.  My grandpa, my dad, and me all used HOPPE’S.  I may actually be a fourth generation HOPPE’S guy, but no one alive knows what Great Grandpa used.

   The best thing HOPPE’s NO.9 Bore Cleaner has going for it, beside the fact that it works super amazingly, is that it’s the cheapest option out there.  HOPPE’S is always the cheapest gun cleaner in the gun store. Plus, most guys seem to think it smells strangely pleasing.

   I will probably continue to recommend HOPPE’s Bore Cleaner to my team as long as it’s obtainable.  It’s not a do-all like CLP or Ballistol. HOPPE’S will dry leaving about 0.3 percent of its original volume in clean oil, which isn’t anything really. That’s why I carry two bottles in my cleaning kit. 

   I carry HOPPE’S Bore Cleaner, and for now, 3in1 oil for lubrication.  But I’m looking forward to the day when that bottle is finally empty and I’ll refill it with 20 weight synthetic engine oil left over from my last oil change.

I’ll see you next time. Until then, shoot straight and keep your head down.

Jordan Buck

Jordan Buck is an outdoor writer, a man of faith, and a family man. He grew up hunting, fishing, and trapping. Jordan has taught marksmanship, woodsmanship, and self-defense classes. He has earned black belts in four martial arts and is a certified Krav Maga instructor. He also runs his own Gun Blog and YouTube Channel. Jordan enjoys giving his time and resources to help others and has spent 15 years volunteering in a boy's mentoring program He is and will always be an American Patriot. MOLON LABE

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