Oil recommendation for my 1970 dodge dart with 318 engine

Mobiol 1 0W 40 in my 69 318
under $25 jug at walmart
the 40 is really a high 30
0W allows you to hit the interstate while not fully warmed up
most wear is when you are cold
15 or 20 K change is for fI cars (annual model)
I just change once a year with carb
agree on a good filter- you can use the long one