In cruise flight at 23"mp and 2300 rpm, mixture full rich fuel flow is 11gph. The aircrafts IAS seems slower by about 10kts than it was a few months ago. Also now oil temperature is fluctuating between 180 and 200 degrees, it was always stable at about 150 degrees in the past. Also I noticed at full power on take off fuel flow was only 19gph; I think it should be higher.
It seems to me that the fuel system needs to be adjust to increase flow for takeoff and cruise. Could this reduced fuel flow cause the increase in oil temperature? I'd appreciate your thoughts on this.