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Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by **b**, May 23, 2000.

  1. **b**

    **b** 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    279
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    Location:
    KIllington, VT.
    oil that is
    Black Gold
    Texas Tea.....

    i have 95k on my
    K5...

    For the summer iwas thinkin'
    of running 20\50 weight...

    Will this give me problems???
     
  2. slodawg

    slodawg 1/2 ton status

    Joined:
    Apr 30, 2000
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    Location:
    Southern Arkansas
    I run rotella 15w40 in both my k5's. Got around 124,000 on my 75 model (350) and 10,000 on my 78 (350) after a rebuild when it had 165,000 on it. Ive never had any complaints.
     
  3. 1bad2

    1bad2 Registered Member

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    Location:
    Jacksonville, FL
    I've got 100+k on my 88 and use 10w30
     
  4. Blazer1970

    Blazer1970 1/2 ton status

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    Location:
    Old Mission, MI
    It's best to run the smallest cold/hot viscosity ratio (10W30) that you can get away with. The viscosity modifiers that they add to get a big ratio are not the best stuff to be pumping through your engine if you don't need to. Stick to the manufacturer's recommendations.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  5. **b**

    **b** 1/2 ton status

    Joined:
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    Location:
    KIllington, VT.
    10/40 it is then..
    maby a shot of mystery oil???
     
  6. Executioner

    Executioner 1/2 ton status

    Joined:
    Feb 22, 2000
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    Location:
    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    If you can find it give 20w-40, or 15w-40.
     

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