> Does anyone have any recommendations?
A few....
1) specify the type of engine and aircraft
2) check the obvious things first:
Is there enough oil?
Is the oil freely moving through the oil cooler?
Is cool air blowing through the oil cooler?
Was it working fine before? Or was the oil always too hot?
If it is a recent problem, what changed? (Change it back)
If it is a chronic
problem with this aircraft, what is the air pressure drop across the cooler? What is the air temperature increase after passing through the oil cooler? Is the right oil cooler installed?
It is not at all clear to me that the warm oil is an indication of a fuel problem.
If all 4 or 6 cylinders are running smoothly ROP and LOP, then the problem is heat removal, not fuel supply. If the CHTs are OK, then the problem is specifically about the oil system, and not airflow over the cylinders.
Changing the fuel system when the oil cooler is clogged would just compound the problems.