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  1. #11


    I have been using Quaker State High Milage (conventional) oil in my truck since it hit 75,000 miles. It is now at 145,000 and no problems.
    Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
    Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
    NRA Endowment Member 5 24 48 88 - Hendrick Motorsports FTW!

  2. #12

    Join Date
    Sep 2010
    everett, massachusetts


    since 2000 I have used mobil 1 In my 2000 silverado 5.3L. change oil every 8,ooomi. filter [pure one purolator/ or wix] every 4,ooomi. so far no leaks or problems. runs better now than new than with that dino reg oil for sure.

    ON leaks. as these vehicles age you may get some small leaks. replacing the PCV every 30,ooomi helps .

    But lets say you do have some leaks. I have used in other vehicles bars oil stop leak. just using 3 OZ. I have successfully stopped leak in my 1996 impala[rear main] and on a 2005 toyota avalon 3.5L engine. rubber seals do shrink with age . on the avalon it would be a very big job to replace those seals[ remove engine] !

  3. #13


    Synthetic is the best thing you can do for your engine.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

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