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PostPosted: Mon Dec 26, 2005 2:46 pm 
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Joined: Sat Sep 03, 2005 9:25 am
Posts: 4582
Location: Ontario, Canada
Pellgunoil is 30W Non-Detergent motor oil (30W-ND). About 5 years ago we covered this topic on another airgun forum. The topic still comes up often. A kind airgunsmith name Russ Best has occasionally posted the facts about Pellgunoil. He worked as a machinist for a company that used "Pellgunoil" by the quart. The product is 30W-ND motor oil, manufactured by Lubrication Engineers in Fort Worth Texas. This company adds a red tint in their products. The exact product name is "Monolec GFS Engine Oil". Some people mistake pellgunoil for trannie fluid but it's not the same.

A few years ago I was e-mailing with Craig who ran "CO2une" business. This business specialized in modifying the QB-78 and Cr2240/50 airguns. Craig told me that he uses 30W-ND motor oil on his rifles.

Although "air tool oil" is likely fine on seals, it's not the thing for all airguns. My TAU-7 worked fine with Pellgunoil. I once tried two drops of air tool oil to a bulk fill and leakage started at the valve seal. I disassembled the pistol and cleaned out all the oil. I re-applied Pellgunoil and started adding 2 drops to every second bulk fill and everything worked fine again. Some airguns might like air tool oil but the TAU didn't.

The 30W-ND motor oil is about $2 per litre at Walmart but it's not packaged as conveniently as Pellgunoil.

HTH,
Todd


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PostPosted: Mon Dec 26, 2005 9:36 pm 
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Joined: Thu Oct 13, 2005 4:20 pm
Posts: 2374
Location: Spruce Grove AB
ok, i got me some crosman pellgun oil today. gonna do "another complete tear-down and clean the hell out of everything :lol: but hey, any of you guys able to recommend something to clean all the oil out of all the parts? is gas good enough? or should i use like a paint thinner or something? any pointers?

oh yeah! forgot, i got some metal polishing paste too, i have used it on aluminum and i can get it to a mirror finish, so it should work good on brass, not too sure about steel though... we'll see what happens!


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 Post subject:
PostPosted: Tue Dec 27, 2005 12:10 am 
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Supporting Member 2013

Joined: Wed Sep 14, 2005 8:47 pm
Posts: 1689
Location: 123 gun street Nova Scotia
NEVER!!!!!! Oil your cylinder every time you shoot???!?!?!?!? I wouldn't do that if I were you...

ok .... why !!!!!!!!!!!! (lol) . i'm not dumping a letter in it . just a bit . thats just if i havent used it for a while . i don't oil it every shot . but a drop before you use it is not a bad thing :twisted: . what is going to keep it lubed ? also most gets pushed back and rubbed off it will not hurt it. you should put some on it
i hope i know a little about guns... maybe not ...who knows , i could be a 10 year old girl . LOL


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PostPosted: Tue Dec 27, 2005 8:34 am 
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Joined: Thu Sep 08, 2005 12:58 pm
Posts: 1657
Location: Cochrane, Ontario Canada
TCooper, I stand corrected on the composition of Pellgunoil. The stuff that I use is "Gunslick Gun Oil" and it is mineral oil.

_________________
Come and visit ..Doctor Frankenguns Airgun Forum..


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 Post subject:
PostPosted: Tue Dec 27, 2005 1:57 pm 
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Joined: Mon Dec 19, 2005 9:19 pm
Posts: 1839
Location: British Columbia
Metalmuncher49 wrote:
TCooper, I stand corrected on the composition of Pellgunoil. The stuff that I use is "Gunslick Gun Oil" and it is mineral oil.
Exact stuff I use. :D


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PostPosted: Wed Dec 28, 2005 2:15 am 
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Joined: Thu Oct 13, 2005 4:20 pm
Posts: 2374
Location: Spruce Grove AB
alright, got all the bugs worked out... i think :lol: im tried out the pellgun oil, worked great! so good that my orings started slipping out of their grooves whenever half decent pressure was reached (about 15 pumps) :lol: i guess the grooves needed to be cut square, not round to fit the orings. i got it so they fit kinda loose, gives me a bit more pump headspace, but at least they dont slip anymore. it sucked, everytime id have a slip id have to take the piston out and roll the orings around a bit to make them seal again.

replaced the valve stem also... but with the old style brass type. you still can cut and grind them down smaller, i did. cut the back part half way off and rounded off the step a little. just not too sure how much material is there that i can work with... :roll: we'll see :lol:

next project to take on is to see wether my barrel is TOO long or not. i have no idea if it is. ive heard that too long of a barrel in a pumper can actually tax power output. anyone know more about this? i figure if i could find out how much pressure the valve can hold, i can do some math involving valve volume, pressure, and barrel volume... does this make sense?


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