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    Shell Rotella T syn 6975 miles 86 Buick 3.8

    This Buick drives me crazy. I changed this engine about 14K (reman)ago and it is all over the map wear wise. I ran this oil way longer than planned but due to an illness I was unable to change this oil for a very long time. I'm going to drop this oil in about 6 months and go back to dino and...
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    5w-40 Shell Rotella syn 6768 miles 97 GMC 5.7

    My truck loves this oil.
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    PP 5w30 7691 03 Tahoe

    looks good to me.
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    Penz Plat 5w-30 2K Ford 4.6

    The car has 79K total miles and the oil was in the pan for a year with less than 1700 miles. It had several quarter mile passes and did see regular heavy duty street action. It also has a K&N installed and please I don't care about the k&n debate.
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    Shell Rotella T Synthetic 5w-40/3158 miles/97 GMC

    Oil was in use for 8 months with a Supertech filter. My truck really liked this oil. I am considering 1 year oil changes with this oil regardless of mileage. I currently have some valvoline maxlife semi-syn and a Supertech installed. I am thinking with its higher miles the 5w-40 cushions the...
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    Penzoil Plat 5w-30 6090 miles 03 Tahoe

    Oil was run to 1% remaining on OLM. A Supertech filter was used. I was really concerned with the dramatic increase in an extra 1K miles. I changed the oil and filter with the same as in the previous sampling to have back to back results. My gut feeling tells me that this vehicle doesn't care...
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    2000 GMC/Mobil1/5w30/ 5900 miles

    Here ya go... It doesn't use anti-freeze but I'm wondering if the oil cooler may be leaking a bit.
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