My toyota was messed up by oil too, going the other way. It ran 5w30, and one day I had a case of 10w40 and decided to just put that in :Facepalm:
About halfway through that oil interval, I got ticky lifters. I dumped and changed it to the 5w30, and about halfway into the next interval it went away
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears