I've done a few oil analysis with a 7.3L powerstroke engine I swapped into my 94 F250. Before I put the engine in I installed new bearings. The first four analysis were with Schaeffer 5w-40 and then I did two with Service Pro 15w-40 and then I did one with Delo 400 5w-40. The lead numbers are noticeably higher with all the 5w-40 results. Do you think this is something I need to worry about? I like using the 5w-40 in the winter as it helps my HEUI system run a lot easier.
Miles 5100, 10200, 13800, 9650, 5010, 9371, 9777
Oil Sch, Sch, Sch, Sch, SP, SP, Delo
Iron 25, 31, 37, 35, 18, 30, 38
Chrm 0, 0, 1, 0, 1, 1, 1
Alum 2, 1, 4, 3, 11, 15, 6
Copp 6, 10, 15, 10, 5, 7, 6
Tin 4, 6, 7, 4, 5, 7, 6
Lead 13, 23, 31, 35, 11, 17, 34
Miles 5100, 10200, 13800, 9650, 5010, 9371, 9777
Oil Sch, Sch, Sch, Sch, SP, SP, Delo
Iron 25, 31, 37, 35, 18, 30, 38
Chrm 0, 0, 1, 0, 1, 1, 1
Alum 2, 1, 4, 3, 11, 15, 6
Copp 6, 10, 15, 10, 5, 7, 6
Tin 4, 6, 7, 4, 5, 7, 6
Lead 13, 23, 31, 35, 11, 17, 34