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Oil change

Discussion in 'GM Powertrain' started by kharlanov, Sep 4, 2011.

  1. kharlanov

    kharlanov New Member

    I have a 2000 GMC Savana 6.9TD with 178K on it, I am a courier using this car daily driving over 70 miles a day, would like to know what recommended engine oil and oil filter will be good for these conditions? A filter that can actually filter out the engine dirt and perhaps a tip on a engine flush before changing the oil to clean it out and what kind of product is good for that thank you for your time and answers.

    P.S. how often does the fule filter needs to be replaced?
    Last edited: Sep 4, 2011
  2. LoneWolf'burban

    LoneWolf'burban Rockstar 100 Posts

    Don't use synthetic oil. On an engine with that much wear has more room between metal on metal parts and thin synthetic oil doesn't protect it very well. I've always used Pennzoil and the only motor that failed me had the oil pressure gauge line break and dump two quarts into the driver side floorboard in 5 miles. Best thing to do is find a petrolium oil that's made for high milage motors. And for the filter, go with a leading brand. They all filter about the same. True some are better than others but the standard measurement for debris they catch is 40 microns. Go too much smaller than that and you restrict oil flow and may end up with the bypass valve in the filter opening allowing nothing but unfiltered oil through your motor.
  3. Sorry but this is about the worst advice I have ever heard.

    You are crazy to NOT use synthetic oil. They cost more but they do a much better job and last much longer.

    What exactly is "a leading brand"?

    Avoid Fram, they are garbage. I honestly like the Amsoil Ea filters. Napa Gold is a quality filter, Elf/Donaldson as well.

    I am an Amsoil fan, they make good oil but there are other great oils on the market as well. Mobil 1 is pretty tough to beat because it is so easy to find. Pay extra for full synthetic. I'd probably look for a 3w30 or 5w30.
  4. LoneWolf'burban

    LoneWolf'burban Rockstar 100 Posts

    An oil that provides a thicker buffer between metal on metal contact is better for a high milage engine because it doesn't run off as fast, it doesn't leak past aging gaskets and seals like a thinner oil, and provides better protection at the morning start up. It sticks and protects.
  5. dpeter

    dpeter Rockstar 3 Years 100 Posts

    My advice would align more with Mile High. If you are good about changing on schedule and not going over by months or thousands of miles then I would choose whatever name brand that was on sale. I keep my vehicles past 200,000 miles and I have never replaced one because the engine quit and have changed oil every 4 to 5 thousand miles. I would recomend checking out "Bob is the oil guy" web site http://www.bobistheoilguy.com/ . His opinion on oil will come closer to fact than mine.
  6. Mean_Green_95

    Mean_Green_95 Epic Member 5+ Years 1000 Posts

    Go with an oil that is specially formulated for high mile engines. They have special additives that help out older and higher mileage engines.
  7. Too thick and you won't have correct protection. Pretty much ALL oil is too thick at startup. Even a very good zero weight oil is too thick at startup to provide adequate protection. Until the oil gets up to temp they are all to thick. That is the reason why most of the wear happens at startup. Frequent starting and stopping of the motor is one of the hardest things on it.

    Bob the Oil guy has good info. You should go there and study. I am by far not an expert on the subject but unless you are running major heat there is no reason not to go with a thinner oil. I am running a 0w30 myself.

    http://www.amsoil.com/storefront/azo.aspx

    L
    ook at the specs here:
    [TABLE="width: 100%"]
    [TR]
    [TD]
    [TABLE="width: 100%"]
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    [TD][TABLE="width: 640"]
    [TR]
    [TD][TABLE="width: 100%"]
    [TR]
    [TD][TABLE="width: 100%"]
    [TR]
    [TD][TABLE="width: 100%"]
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    [TABLE="width: 100%"]
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    [TD="colspan: 2"]
    TYPICAL TECHNICAL PROPERTIES
    [/TD]
    [/TR]
    [TR]
    [TD="colspan: 2"]
    Signature Series 100% Synthetic 0W-30 Motor Oil (AZO)
    [/TD]
    [/TR]
    [TR]
    [TD]Kinematic Viscosity @ 100°C, cSt (ASTM D-445)[/TD]
    [TD]
    10.5
    [/TD]
    [/TR]
    [TR]
    [TD]Kinematic Viscosity @ 40°C, cSt (ASTM D-445)[/TD]
    [TD]
    59.0
    [/TD]
    [/TR]
    [TR]
    [TD]Viscosity Index (ASTM D-2270)[/TD]
    [TD]
    170
    [/TD]
    [/TR]
    [TR]
    [TD]CCS Viscosity, cP @ (°C) (ASTM D-5293)[/TD]
    [TD]
    5954 (-35)
    [/TD]
    [/TR]
    [TR]
    [TD]Flash Point °C (°F) (ASTM D-92)[/TD]
    [TD]
    224 (435)
    [/TD]
    [/TR]
    [TR]
    [TD]Fire Point °C (°F) (ASTM D-92)[/TD]
    [TD]
    246 (475)
    [/TD]
    [/TR]
    [TR]
    [TD]Pour Point °C (°F) (ASTM D-97)[/TD]
    [TD]
    -51 (-60)
    [/TD]
    [/TR]
    [TR]
    [TD]NOACK Volatility, % weight loss (g/100g) (ASTM D-5800)[/TD]
    [TD]
    7.8
    [/TD]
    [/TR]
    [TR]
    [TD]High Temperature/High Shear Viscosity
    @ 150°C, 1.0 X 10[SUP]6[/SUP] s.[SUP]-1[/SUP]), cP (ASTM D-5481)
    [/TD]
    [TD]
    3.1
    [/TD]
    [/TR]
    [TR]
    [TD]Four-Ball Wear Test @ 40 kgf, 75ºC,
    1200 rpm, 1 hr, scar diameter, mm (ASTM D-4172)[/TD]
    [TD]
    0.35
    [/TD]
    [/TR]
    [TR]
    [TD]Total Base Number (ASTM D-2896)[/TD]
    [TD]
    12.6
    [/TD]
    [/TR]
    [/TABLE]


    [/TD]
    [/TR]
    [/TABLE]
    [/TD]
    [/TR]
    [TR]
    [/TR]
    [/TABLE]
    [/TD]
    [/TR]
    [TR]
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    [/TABLE]
    [/TD]
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    [/TABLE]

    [/TD]
    [TD]

    [/TD]
    [/TR]
    [/TABLE]

    Take note of the pour, fire and flash points as well as the 4 ball test.

    Now a 10w40 oil:
    [TABLE="width: 100%"]
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    [TD][TABLE="width: 640"]
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    [TD][TABLE="width: 100%"]
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    [TABLE="width: 100%"]
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    [TD]
    TYPICAL TECHNICAL PROPERTIES
    AMSOIL XL 10W-40 SYNTHETIC MOTOR OIL
    [/TD]
    [TD="bgcolor: #CCCCCC, align: right"]
    10W-40
    (XLO)
    [/TD]
    [/TR]
    [TR]
    [TD]
    Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
    [/TD]
    [TD="align: center"]15.2[/TD]
    [/TR]
    [TR]
    [TD]
    Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
    [/TD]
    [TD="align: center"]102.7[/TD]
    [/TR]
    [TR]
    [TD]
    Viscosity Index (ASTM D-2270)
    [/TD]
    [TD="align: center"]156[/TD]
    [/TR]
    [TR]
    [TD]
    CCS Viscosity, cP @ (°C) (ASTM D-5293)
    [/TD]
    [TD="align: center"]6288 (-25)[/TD]
    [/TR]
    [TR]
    [TD]
    Flash Point °C (°F) (ASTM D-92)
    [/TD]
    [TD="align: center"]236 (457)[/TD]
    [/TR]
    [TR]
    [TD]
    Fire Point °C (°F) (ASTM D-92)
    [/TD]
    [TD="align: center"]250 (482)[/TD]
    [/TR]
    [TR]
    [TD]
    Pour Point °C (°F) (ASTM D-97)
    [/TD]
    [TD="align: center"]-38 (-36)[/TD]
    [/TR]
    [TR]
    [TD]
    Noack Volatility, % weight loss (g/100g) (ASTM D-5800)
    [/TD]
    [TD="align: center"]7.0[/TD]
    [/TR]
    [TR]
    [TD]
    High Temperature/High Shear Viscosity
    @ 150°C and 1.0 X 10[SUP]6[/SUP] s[SUP]-1[/SUP], cP (ASTM D-5481)
    [/TD]
    [TD="align: center"]4.2[/TD]
    [/TR]
    [TR]
    [TD]
    Four Ball Wear Test @ 40 kgf, 75°C,
    1200 rpm, 1 hour, scar diameter, mm (ASTM D-4172)
    [/TD]
    [TD="align: center"]0.43[/TD]
    [/TR]
    [TR]
    [TD]
    Total Base Number (ASTM D-2896)
    [/TD]
    [TD="align: center"]9.0[/TD]
    [/TR]
    [/TABLE]
    [HR][/HR]​
    [/TD]
    [/TR]
    [/TABLE]
    [/TD]
    [/TR]
    [TR]
    [/TR]
    [/TABLE]
    [/TD]
    [/TR]
    [/TABLE]
    [/TD]
    [/TR]
    [/TABLE]

    [/TD]
    [TD]

    [/TD]
    [/TR]
    [/TABLE]

    Note there is MORE wear on the 4-ball test, It has a little bit better high temp protection but at startup it is much thicker and won't flow as well at low temps. These are BOTH synthetic oils. These numbers will be drastically lower on a non-synthetic oil


    Penzoil themselves have a myth page about synthetic oils.
    http://www.pennzoil.com/#/about-motor-oil/
    Click the synthetic oil myths link. (flash site, I cannot link it)

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