What Oil For S-trim 306?

[StangYellow]

What would you use? 306, ported GT40p iron heads. I've gone through many different oils. Curious to see what others use in theirs.

 

[mikestang63]

oil is oil IMO. whatever you are using now is fine. I prefer Rotella but I'm sure you'll get 100 opinions. If you want to spend the money then Brad Penn.

 

[NIKwoaC]

5w30

 

[JD1964]

Full synthetic. 10-30 Mobil 1