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Castrol Hypoy C 80w-90?

Discussion in 'Technical Chat' started by Mossy, Apr 6, 2013.

  1. Apr 6, 2013 at 1:30 PM
    #1
    Mossy

    #1
    Mossy [OP] Mechanic for Honda

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    Anybody using it? I have a 97 sr5. Any opinions or suggestions of something better?
     
    Mossy, Apr 6, 2013
    #1
  2. Apr 7, 2013 at 4:45 PM
    #2
    Mossy

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    Mossy [OP] Mechanic for Honda

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    Anyone?
     
    Mossy, Apr 7, 2013
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  3. Apr 15, 2013 at 2:23 PM
    #3
    Mossy

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    Mossy [OP] Mechanic for Honda

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    Bump
     
    Mossy, Apr 15, 2013
    #3
  4. Apr 16, 2013 at 6:35 PM
    #4
    azreb

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    azreb Geezer

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    From what I have read on the web it sounds like an acceptable lube for differentials. The advertisements say it is intended for manual transmissions, also. However, it is a GL-5 lube. From previous research, I decided against using GL-5 gear oil in my manual transmissions. The sources I saw (sorry--no links. I did this research a year or so ago) said that the additives that make the GL-5 work well in differentials contain chemicals that are corrosive to copper and brass. The syncros in manual transmissions are brass.
    YMMV. I have seen other brands of GL-5 gear lube with manual transmissions mentioned in the application notes, but I choose to not take any chances. I found a synthetic GL-4 lube that has worked well for me.
     
    Last edited: Apr 16, 2013
    azreb, Apr 16, 2013
    #4
  5. Apr 16, 2013 at 6:38 PM
    #5
    KenLyns

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    KenLyns 8.75" Third Member

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    FYI Toyota owner's manual specifies GL5 for manual transmissions for all years Tacos.

    Can you even find GL4 easily in auto parts stores?
     
    KenLyns, Apr 16, 2013
    #5
  6. Apr 17, 2013 at 12:37 PM
    #6
    azreb

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    azreb Geezer

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    The manual for mine recommends GL-4 or GL-5. For the reasons I mentioned above I will stick with the GL-4. I found Redline MT90 GL-4 on the web.
     
    azreb, Apr 17, 2013
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  7. Apr 17, 2013 at 4:53 PM
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    BUZZCUT

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    BUZZCUT Well-Known Member

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    BUZZCUT, Apr 17, 2013
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  8. Apr 17, 2013 at 4:59 PM
    #8
    Jetman1979

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    Jetman1979 Well-Known Member

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    castrol makes some good lubes. I have used there engine oil for years I say go for it.
     
    Jetman1979, Apr 17, 2013
    #8

Products Discussed in

Mobil 1 104361 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)
$29.67
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