My dealership ran my sample to Blackstone and when I was in for tire rotation and tire wear check,fluid checks.They gave me a copy,the Cummins tech ran it,when he dropped my oil a week ago.Well there goes my one free oil change.Blackstone Labs said that copper was at 241 average is 7,and silicon was at 11 the average is 5,and all other metals were in line.11213 miles on truck,first oil change.So my dealership has given me there blessing now so off we go,with our 5th wheel.We are planning around a 4800 mile trip.Hope to see you all down the road....

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