I run a 10 w 40 FULL SYNTHETIC on my 221,000 mile + motor. ORGINAL no rebuild etc.
I drag race very frequently. STOCK TB-OIL pan and run low 8's all motor in the 1/8th mile.
Just let your car warm up in the cooler mornings. That will help your motor live longer. IE oil pump driveshaft. i had to replace mine already. At the 218,606.6 mile mark,