Synthetic 5W-20 as a Case Lube?

264junkie

Well-Known Member
Joined
Jan 7, 2010
Messages
117
Location
Central Maine
Anyone use it? I would assume it's almost impossible to clean from the cases?

Found this online:
The very best case lube for bottle neck rifle brass is 100% synthetic motor oil. Castrol Syntec 5W20 works very well, but other viscosities would probably work well too, as would the full synthetic (not synthetic blends) from other manufacturers such as Mobile-1 or Amsoil.


  1. Pour 1/8" of full synthetic motor oil into the cap.
  2. Dip the case neck, so the oil coats the open end of the case neck approximately 1/8" on the inside and outside of the neck. It's important to lubricate the inside of the case neck so the expander rod won't stick or drag so much that the brass is stretched and work hardened which would soon result in case neck splits.
  3. Use your finger to wipe the oil off the outside of the case neck, which will leave a very thin film on the outer case neck. Wipe that oil down the outside of the brass. Avoid case lube on the shoulder (the angled portion of the brass below the case neck and above the body) because oil on the shoulder can result in hydraulic dents on the shoulder. Hydraulic dents are caused when the resizing die pushes the incompressible oil into the brass. Hydraulic dents will be pushed back out when the round is fired but will result in work hardening the brass and shortening its life.
  4. Resize the brass.
  5. Tumble the brass after resizing to remove the resizing lube and clean inside the primer pocket, prior to reloading.
The advantages of 100% synthetic motor oil:

  • Very inexpensive. $5 per quart for a lifetime supply.
  • Readily available at auto parts stores and automotive sections of department stores.
  • Fast - smaller calibers need lubrication only every 10th case!
  • Easy to use.
  • Not as messy as sprays and sticky waxy lubes.
  • A small amount is needed, so it lasts longer and doesn't gunk up the tumble cleaning media.
  • Extremely effective. Demonstrated repeatedly lubricating only every 20th .223 case! The only lubricant that allowed resizing oversized .50 BMG brass that had been fired in a loose chambered machine gun.
 

royinidaho

Well-Known Member
Joined
Jan 20, 2004
Messages
8,950
Location
Blackfoot, Idaho
Adding PowerUp NNL-690 would improve whatever is to be used as a lube.

I don't care for dipping the neck, puts lub in same compartment as the powder. Even if it is only every 20th cartridge.

I would also think that if 5-20 is good........0-20 would be better.

With steep shoulder'd wildcats it may difficult to not get it on too heavy.......

Several decades ago I used motor oil w/STP. was slippery but thick.
 

kraky

Well-Known Member
Joined
Sep 4, 2001
Messages
301
WHY....WHY...WHY would I screw around with motor oil?? I do a few oil changes on my cars, mowers, etc. You don't just "wipe oil off"....you have to wash it with detergent and water or the film stays behind.
I still like the old fashioned rcbs grease pad for nomal reloading...wipes off fine with a wet cloth.
For tough jobs I use imperial sizing wax......wipes off with a wet cloth.
I wouldn't mind a little of either one in my tumbling media.....I don't want motor oil in my tumbling media.
A tin of imperial lasts forever....rcbs lube is cheap......why in the hell would I want to use motor oil? I'm too dumb to get the point.
 

boomtube

Well-Known Member
Joined
Oct 8, 2007
Messages
1,595
Location
Mountians of SW NC, near Asheville
"Found this online: The very best case lube for bottle neck rifle brass is 100% synthetic motor oil."

I strongly question the value of that source. I've tried most commercal lubes and a lot of subsitutes but haven't tried "synthetic motor oil", doubt I will and certainly never in my case mouths.

Standard motor oils sure don't work very well, no reason to think there's any magic in synthetic and NO such potentially contaminating lube is going to get around my ammo. One of the qualities of good auto lubes is wicking ability and that offers a potential damage to powder and primer. Any such oil tends to cling to fingers pretty well, contaminated fingers and handling primers is a bad idea. Oils are difficult to remove without a solvent, a dry wipe sure won't do it.

The only "sticky" case lubes I've tried were those like STP and lanoline, not the waxes. Waxes - Redding's Imperial and Hornady's Unique - are clean, easy/fast to apply with just finger tips without using a quickly dirted lube pad. It leaves the cases and hands as clean as they need be with just a paper towel, dry wiped. The waxes are harmless to both powder and primers, it works VERY well and it's cheap enough.
 

winmag

Well-Known Member
Joined
Dec 23, 2009
Messages
2,529
Location
LaPine Or.
Maybe if the end of the world was at hand, and Sportsmans wasnt open before the battle.............hehehehe:D
Ill stay with my Redding wax, Thanks.
 

sambo3006

Well-Known Member
Joined
Jul 30, 2004
Messages
1,370
Location
SW MO
How often are you supposed to change your oil?

Another vote for Imperial Sizing Wax. It is more expensive than a tube of Lee lube but it lasts about 50 times as long and no build up or dented shoulders.
 

Iron Worker

Well-Known Member
Joined
Apr 3, 2004
Messages
2,225
Location
Reno Nevada
My case lube style is use both the RCBS lube pad for the out side and Hornady "One Shot"spray for inside and out side of case necks. Then dump them in a brass Tumbler/vibrator for a few hours.
 

264junkie

Well-Known Member
Joined
Jan 7, 2010
Messages
117
Location
Central Maine
Maybe if the end of the world was at hand, and Sportsmans wasnt open before the battle.............hehehehe:D
Ill stay with my Redding wax, Thanks.

Good to know I was right to think this idea a bit.....How should I say..."off.":D
I googled "case lube" to see if there were any recipe's for a lanolin mix and came across that site. :cool:
 

Johnboy

Well-Known Member
Joined
Sep 25, 2009
Messages
284
Location
Cheraw S.C.
I like mink oil shoe polish.It cost less for more.and does a really good job.to me its just like imperial sizeing wax.and it has lanolin in it I think.and comes off with a rag.
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 
Top