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  1. #1
    ...there I was... bloodhound's Avatar
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    ...another grease thread...

    So, based on the polls and posts, it seems that the big debate is bike-specific vs. automotive vs. lithium greases. Of course, I browsed through the posts after trying my own idea:

    http://back2dabike.wordpress.com/200...earing-grease/

    Yes, there are precautions against mixing/blending different greases... But it just made sense that the white lithium grease seemed too "thin", while the automotive grease seemed too "thick", and mixed together they seemed just "right"...

    I've already done it, it's already on the bike. However, has anyone ever done this and regretted it?
    ...not hobbies really, more like addictions...
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  2. #2
    Sir Fallalot wroomwroomoops's Avatar
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    Quote Originally Posted by bloodhound View Post
    So, based on the polls and posts, it seems that the big debate is bike-specific vs. automotive vs. lithium greases. Of course, I browsed through the posts after trying my own idea:

    http://back2dabike.wordpress.com/200...earing-grease/

    Yes, there are precautions against mixing/blending different greases... But it just made sense that the white lithium grease seemed too "thin", while the automotive grease seemed too "thick", and mixed together they seemed just "right"...

    I've already done it, it's already on the bike. However, has anyone ever done this and regretted it?
    I have. It was terrible - it was like the gears were immersed in molasses. BUT it was a specific lithium grease, it may be different from yours. Mine was "Mobil Mobilgrease Special 2".

    Also, I didn't really blend two types of grease, I only used a solvent to dilute the lithium grease, to get it into the rollers of the chain. It wasn't a real solute, rather a collodial suspension, but for all intents and purpose and for all you would care, it was like a diluted lithium grease and then the solvent evaporates away.

  3. #3
    Elitist Troglodyte DMF's Avatar
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    What the grease "looks like" or "feels like" when you goop it on doesn't have much correspondence to what it acts like whilst being churned and mashed by steel balls.

    Why does everyone try to second-guess lubrication engineers?
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  4. #4
    Senior Member Thumpic's Avatar
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    Kinda new to bikes, but not grease and bearings. For all intents and purposes; bike bearings have no significant load; only rpms. So...a quality "lighter grease" is the way to go. Prepping/inspecting the bearings and races is a far more important consideration that what type of grease....................unless we're talking bacon grease!!!
    Thumpic....

    Green is the new "CHEAP"

  5. #5
    Sir Fallalot wroomwroomoops's Avatar
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    ^^^No significant load, that may well be true, but you still want your grease to stay in place for the longest time. So it's not completely irrelevant what it is.

    Nice drawing in the sig!

  6. #6
    Senior Member Nessism's Avatar
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    Another topic where you guys are overthinking things. General purpose auto grease is fine. Use it and be done. Use bike grease if you'd rather, it's fine as well.
    Becareful buying/selling bike parts on-line. I learned the hard way. :(

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  7. #7
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    Quote Originally Posted by Nessism View Post
    Another topic where you guys are overthinking things.
    Everybody's looking for an edge, and there are so few places, on a bike, where hands-on can really make a difference!

  8. #8
    use your best eye kenhill3's Avatar
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    Quote Originally Posted by Nessism View Post
    Another topic where you guys are overthinking things. General purpose auto grease is fine. Use it and be done. Use bike grease if you'd rather, it's fine as well.
    I, too, am thinking were getting carried away here. This is for bicycles, for christ's sake, no high RPM's and no high loads. Also, I don't think we need to worry about viscous 'drag', I just don't believe it amounts to anything significant. JMHO.
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

  9. #9
    Senior Member
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    Quote Originally Posted by Nessism View Post
    Another topic where you guys are overthinking things. General purpose auto grease is fine. Use it and be done. Use bike grease if you'd rather, it's fine as well.
    +1000

  10. #10
    cyclist/gearhead/cycli... moxfyre's Avatar
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    Quote Originally Posted by bloodhound View Post
    I've already done it, it's already on the bike. However, has anyone ever done this and regretted it?
    I have never regretted using any kind of grease, properly applied! All I have ever regretted is NOT using grease

    So yeah, don't worry about it! I can debate grease choice for days with the best of 'em , but frankly I think just about anything will work great for a bike as long as you replace it with appropriate frequency!!!
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

  11. #11
    Senior Member buddyp's Avatar
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    I only use Dupont Krytox aerospace III. Its $1606 a tube but it shaves .03 seconds off my 40K TT.

    http://www.mcmaster.com/nav/enter.asp?pagenum=2089

  12. #12
    cyclist/gearhead/cycli... moxfyre's Avatar
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    I prefer Apiezon vacuum greases... absolutely critical for operating my bike in an ultra-high-vacuum environment!!! http://www.microscopes.com/ms-m2-lb-m-00100.html
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  13. #13
    dcb
    dcb is offline
    THAT GO dcb's Avatar
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    What about a crank scraper and a windage tray?

  14. #14
    Mr. Dopolina Bob Dopolina's Avatar
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    Quote Originally Posted by DMF View Post
    Why does everyone try to second-guess lubrication engineers?
    +1.

    What about synthetics. Anyone here have anything to add? If so, please include some chemistry. Can anyone contribute as to how and why Teflon, Ceramics, Silicone or various other components, such as, solvents or binding agents are added to bike-specific lubricants and why they may differ from each other and/or greases designed for other commercial or industrial applications?

    Please be specific as to whether you are referring to petroleum based, pure synthetic based or some of the petroleum based "synthetics" in your post.

    This would be an interesting grease thread. And we all might learn something to one up our other bike geek friends at your LCS (Local Coffee Shop).

    It's better 'cause it's greener doesn't count, anymore

  15. #15
    use your best eye kenhill3's Avatar
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    Quote Originally Posted by Bob Dopolina View Post
    It's better 'cause it's greener doesn't count, anymore
    OK, Bob. This one's better 'cause it's blue-er:

    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

  16. #16
    Mr. Dopolina Bob Dopolina's Avatar
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    Quote Originally Posted by kenhill3 View Post
    OK, Bob. This one's better 'cause it's blue-er:

    Now that's what I'm talking about.

  17. #17
    Sir Fallalot wroomwroomoops's Avatar
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    Quote Originally Posted by Bob Dopolina View Post
    +1.

    What about synthetics. Anyone here have anything to add? If so, please include some chemistry. Can anyone contribute as to how and why Teflon, Ceramics, Silicone or various other components, such as, solvents or binding agents are added to bike-specific lubricants and why they may differ from each other and/or greases designed for other commercial or industrial applications?

    Please be specific as to whether you are referring to petroleum based, pure synthetic based or some of the petroleum based "synthetics" in your post.

    This would be an interesting grease thread. And we all might learn something to one up our other bike geek friends at your LCS (Local Coffee Shop).

    It's better 'cause it's greener doesn't count, anymore
    I can talk a bit about teflon (or PTFE): it's considered the solid material with lowest coefficient of friction.
    In lubricants, teflon is used as a suspended solid particulate. You get these tiny little balls of teflon into your chain, and they act as lubricant thanks to their high surface slipperiness.Quite different form the long molecules of mineral or syntetic oils.

    Other such "solid lubes" are graphite and boron nitride. But they can't even touch teflon's slipperiness. Teflon is king also in it's high inertness, only matched by gold and platinum. This aspect is mostly lost on motorists and cyclists.

    Regarding synthetic vs. mineral oil: synthetic oils have higher chemical stability across temperatures and against shear, and are less viscous (again, across temperatures) vs. mineral oil. They also oxidize much slower than mineral oils, so they will last longer without deterioration.

    Well, you can find a lot about lubes in this wikipedia article. Until some zealous wikipedia admin decides to "trim the content a bit". I hate it when they do that.

  18. #18
    Sometimes knows stuff. rmfnla's Avatar
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    Quote Originally Posted by wroomwroomoops View Post
    Regarding synthetic vs. mineral oil: synthetic oils have higher chemical stability across temperatures and against shear, and are less viscous (again, across temperatures) vs. mineral oil.
    An important consideration since we're all aware of the high temperatures generated on a bicycle.

    My tub of marine grease is red; will that work or am I doomed to crash & burn?
    Today, I believe my jurisdiction ends here...

  19. #19
    cyclist/gearhead/cycli... moxfyre's Avatar
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    Quote Originally Posted by rmfnla View Post
    An important consideration since we're all aware of the high temperatures generated on a bicycle.

    My tub of marine grease is red; will that work or am I doomed to crash & burn?
    Well, speak for yourself. My bicycle reaches temperatures as high as 310... Kelvin.

    Depends... are you a Communist and/or a Republican?
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  20. #20
    Sometimes knows stuff. rmfnla's Avatar
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    Quote Originally Posted by moxfyre View Post
    Well, speak for yourself. My bicycle reaches temperatures as high as 310... Kelvin.

    Depends... are you a Communist and/or a Republican?
    My bikes are always cool.

    And let's leave religion out of this, ok?
    Today, I believe my jurisdiction ends here...

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