Unnecessary in my experience.
I have tracked with 0W20 oil the entire time (both without and with oil cooler). I don't use special race oil either. Have not seen any issues with oil pressure since I added a means to monitor it.
My oil analysis from multiple tracking scenarios over a variety of climate conditions (very hot to cold). Based on the results, the oil is good for at least 2 track days and a full mileage interval (7500 mi/12000 km). This will vary based on your car's setup and the demands of your local road courses.
Two heavy duty case scenarios both returned just fine for oil and engine health:
- 2 track days /w 8600 mile interval (no oil cooler, winter only tracking): normal wear characteristics, normal oil & filtering characteristics, remaining total base number (TBN) 2.5
- 3 track days /w 7500 mile interval (oil cooler, e85, summer and winter tracking): normal wear characteristics, normal oil & filtering characteristics, remaining TBN 4.6