What engine oil do you prefer,??.

360 iron head flat tappet mill: shell rotella T 15/40
339 W8 roller cam: Torco TR1-R 10.30 Engine builder dynoed with it and recommended it so that's what she'll run....


I also have a case of 5.30 Pur Ol 5.30 syn I may try one of these days.

http://pur-ol.com/purol-elite-series/