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  1. J

    Saturn Outlook and Hummer H2 Oil Recommendations

    Wow thanks for the responses. Yes the H2 has the 4L65E transmission. I wish a swap to the 4L80E was in the budget at that time. I added a larger external transmission cooler vs the factory radiator/transmission hybrid cooler. H2 cooler Thanks again for all the knowledge and advice. -James
  2. J

    Saturn Outlook and Hummer H2 Oil Recommendations

    I have heard synthetics are a no no after 100K. Is that a valid statement?
  3. J

    Saturn Outlook and Hummer H2 Oil Recommendations

    Hello, I would like some guidance on oil recommendations for our two cars. We live in Huntsville AL. 1) 2008 Saturn Outlook This car has 110K miles and is driven by a soccer mom. Tons of stop and go, multiple short miles trips in a day. She is a average speed driver. Mfr recommends 5w30, and...
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