Oil Temp and prop pitch relationship

Is 5200 wide open throttle (WOT) all you can get in flat and level flight? If it is you're severly over pitched and over pitching for anything under 5500 WOT will increase oil temps. That said in the hotter summer months there is nothing wrong with going into the yellow arc area for take off climb. That is actually pretty normal. Yellow just means keep an eye on  me so I don't go into the red. Seeing 230F - 245F in climb out is normal and okay, but once in level flight the temps should drop back down to around 215F - 225F. The oil temp most times are tied to prop pitch, but the big factor is engine and cowl setup that controls air flow over the engine and through the coolers. Some aircraft are just setup better to allow more air cooling.