Here is a UOA from my silverado. This oil was in service for my trip from Indiana to Montana, as well as a couple thousand miles around home which included some towing. There were also several full throttle runs on the trip out west. I did not top off the oil in this run. When the oil was changed it was about 3/4 of a qt low. I didn't add any because i didn't want to boost the TBN and skew the oils true TBN retention number. 7,616 miles in service. about 5 1/4 quarts drained out of a 6 qt sump. Oil filter was a Fram Ultra. I apologize for the poor picture quality. you can magnify the photo on photo bucket to see the numbers.
http://s1289.photobucket.com/user/donnyj08/media/Silverado/IMAG1563_zpsd7y4f82u.jpg.html
http://s1289.photobucket.com/user/donnyj08/media/Silverado/IMAG1563_zpsd7y4f82u.jpg.html
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