Here is my trusty Chevy truck. Oil filter is Wix 51522, air filter is AEM dryflow, 75092 miles total, no make up oil added. I am all out of old Havoline now (bought 48qts at closeout). Next change starts my Shell stash. Blackstone comments: "Lead continued to improve here and all wear is now low enough to be considered normal. It was a long haul for your 5.3L but everything now checks out fine and we see no signs of any obvious problems developing. We see no reason not to run your next oil a bit longer. Try 7500mi next time and check back for another look at wear. If everything comes back looking good, we'll suggest going even longer then. The oil was in good shape physically and contained no harmful contaminants. The 5.3L that powers your Silverado is looking good!" All oil below is old SM Havoline 5w30 or 10w30 except last column which is Mobil 7500. Item, this oci, prior oci, prior to that oci, etc. Al,1,1,2,1,1,2 Chr,0,0,0,0,1,1 Fe,5,6,7,6,9,14 Cu,16,23,31,41,44,58 Pb,11,16,21,28,33,60 Tin,1,0,2,1,2,3 Moly,420,481,448,374,343,108 Ni,1,0,1,0,1,1 Mang,0,1,0,1,1,1 Silv,0,0,0,0,0,0 Ti,0,0,0,0,0,0 K,1,1,0,1,1,0 Bor,19,24,28,16,21,18 Si,14,15,12,8,8,8 Na,4,5,4,7,28,211 Ca,1813,1950,1688,1704,1568,1764 Magn,47,53,41,37,9,6 Phos,682,706,707,617,585,601 Zinc,908,881,848,777,703,750 Bar,0,0,0,0,0,1 SUS vis 210*F,56.7,58.8,56.5,57.5,56.3,58.5 cSt vis 100*C,9.28,9.89,9.2,9.49,9.14,9.78 Flash *F,405,405,385,385,410,365 Fuel%, all <0.5 Antfrz, all 0.0 Water, all 0.0 Insol %, 0.2,0.2,0.3,0.3,0.3,0.3 I am a happy guy. All looks good. We will see in a year how Shell dino works for me. All comments welcome.