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What gear oil are you using?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BozoWise, May 13, 2002.

  1. BozoWise

    BozoWise 1/2 ton status

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    What oild are you guys using for your difs? Just cureous as I am setting up the D44 and 14 FF for transplant.
     
  2. UseYourBlinker

    UseYourBlinker 1 ton status

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    80w-90 Penzoil
     
  3. 74K5CHEYENNE

    74K5CHEYENNE Registered Member

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    Missouri
    I suggest using royal purple.
     
  4. 79Beast

    79Beast 1/2 ton status

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    I buy 5 gallon buckets of Coastal 80w90. It is part number 12217. It is rated GL5. I can't see using really high dollar synthetic stuff when my diffs, tranny, and tcase are all very used and I replace the dope every six months, sometimes more. This geardope can be had at Autozone and Advance Auto for sure.
     
  5. Zeus33rd

    Zeus33rd Smarter than you GMOTM Winner

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    Valvoline DuraBlend 80-90
     
  6. 70~K5

    70~K5 1/2 ton status

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    sillycon valley
    Any good quality 80w/90 GL5 per my '77 Chevorlet service manual.
     
  7. bigmack

    bigmack 1/2 ton status

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    Coastal 80W/90
     
  8. SkulzNBonz

    SkulzNBonz 1/2 ton status

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    Another one for Coastal.
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    IL, USA
    Usually Coasal 80W-90, but I've got a stash of Pennzoil from when I worked at Jiffy lube, so that's in my 14 FF now.
     
  10. hammer

    hammer 1/2 ton status

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    80w/90 with open diff's
     
  11. Boss

    Boss 1/2 ton status Author

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    Whatever is on sale. 80/90
     

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