I know Ford states 5w20 for DD and 5w30 when used during a track day (which should be dumped and refilled with 5w20 after...really???). This isn't a weight vs weight question, just oil vs oil with 5w30. I won't be putting a lot of miles on it as I have another vehicle and only drive 5k as it is. VERY hot summers here, short trips, occasional road trips, and a little spirited driving. Thank you.