Oil

20w-50 with zinc is fine for summer only. Been running it for decades... Main thing is quality oil and zinc. 30, 10w-30, 20w50 it's all good.
I’ve been running Valvoline VR1 20w50
(the VR1 with zinc in it)since I’ve had the car for the past 4 years. I run it spring, summer and a little in the fall on nice days here in Massachusetts. I change the oil at the end of every season, roughly every 1200-1500 miles.