Mobil 1 as gun oil

Discussion in 'AR-15 Discussion' started by CHLChris, Jul 14, 2010.

  1. CHLChris

    CHLChris New Member

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    I've been doing a little reading AFTER I went and bought some Mobil 1 for my new AR build. Oops.

    It seems I bought 5W20. Cane suggests 0W-30 and I've read that 20W50 is good, too. No word on 5W-20.

    First, what are people's experience with this as an overall gun oil? May I use it as a gun oil replacement for every location on any firearm that I would apply gun oil like Hoppe's? Or only in certain locations?

    Second, is the # of the oil important enough that I should go and exchange it for another viscosity?

    Ounce for ounce, this option has got to be pennies on the dollar compared to Hoppe's or RemOil. Thanks for the suggestion, Cane!
     
  2. Poink88

    Poink88 New Member

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    I am using Mobil 1 with Tufoil additive on it :).

    The lower the viscosity number the thinner it is and lower freezing point (IIRC). I use the higher grade since I am in Texas and that is what I use for my car.
     

  3. planenut

    planenut New Member

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    I've tried the search and found little on using Synthetics but it seems to crop up on some of the cleaning threads.

    I'll be following this thread for more info..
     
  4. bkt

    bkt New Member

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    Mobil1 0w-40 is what I use 'cuz it's what I put in my car. Works great.
     
  5. jeepcreep927

    jeepcreep927 New Member

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    I am with BKT. Straight 40 weight synthetic has worked great in my AR's for tens of thousands of rounds.
     
  6. spittinfire

    spittinfire New Member Supporter

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    For what you are doing you will see almost no difference. If you want to use mobel 1 I would use whatever you have on hand. Room temperature keeps all the oils at basically the same viscosity(among friends) and will lubricate your pistol fine. Heat is not even an issue. Even natural oils will push 300 degrees before breaking down and synthetics will go higher.
     
  7. NGIB

    NGIB New Member

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    Been using 10W30 for years with no problems...
     
  8. Bob Hostetter

    Bob Hostetter New Member

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  9. CHLChris

    CHLChris New Member

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    I've heard that about grease. But it seems to me a little odd using dinosaur grease right next to synthetic oil. I have a simple brain on some things and once I go synthetic, it seems that it would be good for my brain to keep it that way. Does anyone know of any synthetic greases?

    BTW, when you say grease, I'm assuming y'all mean that black gooey stuff you put on, say, weight distribution bars for a trailer hitch to get them to insert better? That stuff? Nothing special, right? You buy it in the peanut can-type container?

    Thanks, all!
     
  10. canebrake

    canebrake New Member

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    The viscosity of the oil is not critical unless you carry North of the Arctic Circle. If you do not have any Mobil 1 now, go with the cheapest (on sale) or if you do have a choice, get the lowest viscosity. The fact it is designed to work in a hot carbon deposited environment is its virtue. I clean my gun after every shooting (range or PD) and this stuff makes it easy to wipe off the range sweat & soot.

    DO NOT go wet, just a light mop job on all surfaces and a drip or two on the metal to metal surfaces is required.

    Get yourself one of these:

    [​IMG]

    [​IMG]

    I'm obviously referring to the oil needle but everyone should have a vintage S&W .44 Rem Mag in their arsenal.

    Amazon.com: Empire Level 2776 Precision Oiler

    [​IMG]
     

    Attached Files:

  11. berny2435

    berny2435 New Member

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    I'm not a gun expert but I know general machines, maching centers and cars very well. Manufacturing Engineer by trade.

    A low viscosity, high temp Molly grease is really meant for areas that need a cushion of lube b/c the tollerance b/t the two parts is not real tight. Also meant for areas that are not getting a replenished supply of fresh oil. Good molly grease is really sticky and tacky for this reason. It also applys a lower viscosity film on the surface as well for slippy thin coverage.

    A high viscosity motor oil if you will is meant for tighter tollerances and in a design where the oil is constantly being replenished or forced through an area. Some motors are built with loose tollerances and spec out a heavier weight oil b/c that particular oil will provide more cushion if you will at their specified running temperature.

    I would assume that even a 15W-50 would work for most any gun parts. Mobile one has one of the best 15W-50s you can buy with a typical synthetic oil label.
     
  12. General_lee

    General_lee New Member

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    My boss, the gunsmith that owns the store I work in uses a mixture of WD-40, Marvel mystery oil, and transmission fluid. Seems to work pretty good.
     
  13. spittinfire

    spittinfire New Member Supporter

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    That would make me nervous as none of those is intended to be a lubricant.
     
  14. NGIB

    NGIB New Member

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    Spitty, I've actually read where lots of folks use ATF with good results. As a quart of good synthetic oil lasts forever, I've never been tempted to try it...
     
  15. DougB

    DougB New Member

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    What is the classification of these three then?
     
  16. spittinfire

    spittinfire New Member Supporter

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    ATF is a hydraulic fluid and while offering some lubrication that is not it's intended purpose. WD40 is a penetrating oil and used to displace moisture. Marval is actually intended to be a lubricant(sorry, I spoke too soon) but I've never been a fan of it.

    NGIB, if ATF works for some then more power to them but I'm not going to try it. I don't think it offers the needed characteristics of an oil and it stinks. If I lubed my kimber with that I'd walk around smelling like a tranny shop and my wife wouldn't sit next to me in church.
     
    Last edited: Jul 16, 2010
  17. berny2435

    berny2435 New Member

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    there's a correct application for every oil. Then there is an ideal and then there is the best.. . Many people seem to be using "what works for them" as well.

    Some manual car transmissions have even had an ATF called out for lubrication. ATF is like a 20 weight motor oil. Some OEM transmissions have even been spec'd to use 5W-30 or 40 motor oil. Crazy huh? Not really but not the best use.

    General Lee didn't state what transmission fluid the guy was using. If it was full synthetic, it may very well be a anything between a 5W-30 weight range like Amsoil MTF or a 75W-90 that can be used in transmission and in gears/differentials.

    obviously the 75-90 would be a little more difficult to get into tight tollerance spaces, I wouldn't reccomend it. I would go with a 15W-50 Mobile one before ANY Tranny/gear lube in tight spots. If I need Shock proof fluid, you better have a howitszer or something.. .


    EDIT Oh yeah, in talking to people that are experts in machining, WD-40 actually is not a good lubricant and it will attract Dirt into the area. I would not use W-40 for anything more than high pressure cleaning and then wipe down and re-lube with something else.
     
    Last edited: Jul 16, 2010
  18. General_lee

    General_lee New Member

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    I'm not sure what kind of tranny fluid he uses, I assume it's standard non-synthetic.
    I just asked him what that red oil in the spray bottle that I was using was and that's what he told me.
    He did say that sometimes he'll substitute the Marvel for CLP.

    I don't really see the point in adding the transmission fluid, but the way he described it was: "WD-40 is good for water displacement and rust prevention, but not a good lube.
    Marvel mystery oil, great lube, but not a good rust inhibitor."

    His main use for this mixture is for spraying down gun parts that just came out of the bluing tank, although he will also use it to lube moving parts.

    I have yet to try it on any of my guns as a lube, I prefer a standard gun oil like FP-10 or something similar.

    I did wipe down the external surfaces of my CZ70 with his mixture, and it does work great for preventing rust, but you have to apply a thin coat to prevent attracting dirt.
     
    Last edited: Jul 16, 2010
  19. spittinfire

    spittinfire New Member Supporter

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    That makes sense.