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    Castrol GTX 5W30 4,115 miles 1999 TransAm

    Originally Posted by Linctex Yikes! What oil was in the previous time?? Oil has always been Castrol GTX, only difference was 10W40 then switche to 5W30. At the time of the high lead numbers, I was running Auto Cross several times a month and driving in rush hour traffic. The last seven years...
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    Castrol GTX 5W30 4,115 miles 1999 TransAm

    Originally Posted by RayCJ What happened with the Sodium between the previous sample and this one? Did you find a root cause for that 177 spike? Not sure. I did change from 10w40 to 5w30 after the next to last sample. As you can see I have not driven it much in the last seven years. The roads...
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    Castrol GTX 5W30 4,115 miles 1999 TransAm

    It's been awhile since I last posted. I drive the SUV too much. SQL Query CASTROL GTX 10w30 10w30 10w30 10w30 10w30 5w30 MILES IN USE 3.0k 2.5k 3.2k 3.6k 3.3k 4.0k MILES 45k 75k 81.5k 108k 144k 155k SAMPLE TAKEN...
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