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I was on another forum and some guys say they use 5W30 Synthetic Engine Oil on firearms. I have not tried this but I'm curious. Do any of you use it?
If you use it what parts of the gun do you use it on? Is it used in the bore?
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I use 15w-40 rotella on mine. Inside and outside. No issues in years I’ve used it
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No. I bought a small bottle of gun oil 15 years ago and it's still going strong.
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Campfire Tracker
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There is nothing special about synthetic motor oil, use it as you would any other oil.
I've begun using 0w20 Mobile 1 synthetic as a gun lube. It seems to resist thickening up in cold weather better than other oils. Oil may not be overly important to use in a bolt action rifle but it can be important with semiauto shotgun as some do not like to be run dry. The 0 weight rating keeps it viscosity well below zero so far. As I tend to have a quart or two in the truck emergency box, it is always around if I need it.
I have a fair bit of "gun specific" oil around but the light weight synthetic motor oil seems to be at least as good as well as being much cheaper.
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Campfire Kahuna
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Campfire Kahuna
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There is nothing special about synthetic motor oil, use it as you would any other oil.
I've begun using 0w20 Mobile 1 synthetic as a gun lube. It seems to resist thickening up in cold weather better than other oils. Oil may not be overly important to use in a bolt action rifle but it can be important with semiauto shotgun as some do not like to be run dry. The 0 weight rating keeps it viscosity well below zero so far. As I tend to have a quart or two in the truck emergency box, it is always around if I need it.
I have a fair bit of "gun specific" oil around but the light weight synthetic motor oil seems to be at least as good as well as being much cheaper. I know a couple of gunsmiths that swear by Mobile 1 for Gun oil. I need to try it on my 1911’s. Just think how long one quart would last.
Last edited by chlinstructor; 08/25/20.
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There is nothing special about synthetic motor oil, use it as you would any other oil.
I've begun using 0w20 Mobile 1 synthetic as a gun lube. It seems to resist thickening up in cold weather better than other oils. Oil may not be overly important to use in a bolt action rifle but it can be important with semiauto shotgun as some do not like to be run dry. The 0 weight rating keeps it viscosity well below zero so far. As I tend to have a quart or two in the truck emergency box, it is always around if I need it.
I have a fair bit of "gun specific" oil around but the light weight synthetic motor oil seems to be at least as good as well as being much cheaper. That's good to know that it does not thicken up as much as other oils in cold wheather. It would probably be a good idea for people hunting up north.
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Joined: Jun 2001
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Campfire Ranger
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I have been using Mobil 1 for years. One $8 qt is a life time supply and works better than the $4 ,4 oz gun oils. I use it everywhere firearms should be oiled.. It wets better and sure won't gum up in cold weather
Last edited by saddlesore; 08/25/20.
If God wanted you to walk and carry things on your back, He would not have invented stirrups and pack saddles
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I might give it a try but I'm still working on using up the quart of ATF I bought to use as gun oil 15 years ago.
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Campfire Ranger
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Campfire Ranger
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I use a bunch of 0/20 Mobil 1 on everything AR related and on sliding and moving parts of other rifles. Never had an issue.
Semper Fi
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I have used ATF for 20+ years now with no complaints. Similar.
Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!
Stolen from an erudite CF member.
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I was on another forum and some guys say they use 5W30 Synthetic Engine Oil on firearms. I have not tried this but I'm curious. Do any of you use it?
If you use it what parts of the gun do you use it on? Is it used in the bore? I use it in the summertime..
"I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man."
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I still use the Mobil 1 0W20W out of the quart I bought long ago. Be Well, RZ.
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I once read a discussion about owners of fine shotguns and how they preferred a mixture of ATF and Mobil synthetic oil for lubricating the expensive stack barrel they had.
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Campfire Ranger
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Remember that old commercial......................motor oil is motor oil. Although I use "gun oil", I'd not be afraid in the least to use "motor oil" if it's all that was available to me.
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I'm a huge fan of Ed's Red. Google up the recipe. The first component is 50/50 Kerosene and ATF. That's what I use for gun oil.
5w30 is going to work, but I think ATF is better suited for firearms.
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Campfire Member
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This is year number 10 for me using Mobil 1 synthetic and regular wheel bearing grease on my guns. The wheel bearing grease works awesome very lightly coated on AR15 bolts and BCG rails with just a few drops of oil on the gas rings. I cut the Mobil1 with a little bit of ATF, I see no reason to go back to "gun" lubes (for my needs anyway). I do still spray the exterior of my guns with aerosolized Remoil or Ballistol though. This is also the tenth year that I have been using Eds red, although I leave out the acetone. ATF, Mineral spirits and Kerosene.....works great.
Last edited by bmoney; 08/26/20.
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Very interesting. Thanks for the feedback guys.
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Good grief....all those partial bottles of 5W-20 I have in the garage just provided me a life time supply....
NRA Benefactor 2008
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Good grief....all those partial bottles of 5W-20 I have in the garage just provided me a life time supply.... You aren't kidding. I started using 0/20 Mobil 1 around 2002. We used it on our machine guns and our carbines. Put on sparingly it was so very good. Plus, if you think about it, engine oil has detergents in it, meant to clean as well as lubricate, suspending carbon particles while still doing it's job. Synthetics are just darned slippery and don't really burn either, or at least not till heat is crazy. After I had seen it work so well on our team guns I started using it on my own and haven't ever thought I needed something better.
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5w30 synthetic will flow pretty good in all but the coldest temps......should be good to go for most folks
15w40 will get really thick/sticky in cold weather
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