Just thought I'd share my latest UOA. First sample since I've moved from a 5w30 to 5w40 oil. Still using Valvoline synpower. Gone longer on this sample than previous ones and the wear materials look good overall- lab has flagged viscosity which is just a little low for a SAE40, but hardly a concern at this stage IMHO. Will be running this oil until around 26000km at which point I'll take another sample and see how it looks, may run a little longer or may dump it depending on results