What oil for my new engine

I would use a 30-weight HDEO (Heavy Duty Engine Oil) rather than a racing oil because HDEOs have better detergent additives with similar amounts of ZDDP. In a conventional oil, Shell has Rotella T 10W-30 (CI-4/SL) and Brad Penn has HDEO 10W-30 (CJ-4/SM). A synthetic HDEO is another option and Amsoil 5W-30 HDD (CI-4+/SL) and Chevron Delo Synthethic 0W-30 (CG-4/SJ) are available. Synthetics can have longer oil change intervals so they're not as expensive as they might seem.

ACCCC Engine Oil Article