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Originally Posted by dnewton3 Is this the first run with Amsoil??? If so, this Cu spike is a harmless reaction; a chelation of Cu due to the amines in Amsoil (if I understand the chemistry correctly). The only downside to this effect is that it will completely mask any true Cu indicator from...

Originally Posted by Danno I'd be changing oil and filter. Try to find out where that copper is leaching from. A cooler failing? 745 hrs run time on the oil I know amsoil has always acted a little funny with the oil cooler. No coolant in the oil

15k on oil. Large spike in copper. Do I change the filter and top off or full oil change 144,374 (5192) 149,786 (10631) 154750 (15950) Iron 10 14 27 Aluminum 2 1. 2 Copper 3 12 308 Lead 0 1 6 Tin 1 0 1 Cadmium 0 0 0 Silver 0 0 0 Vanadium 0 0 0 Silicon 5 6 9 Sodium 3 6 6 Potassium 1 0 3 Titanium...