Which oil for rb25det?

[ppark]

Recently bought a 240 with a rb swap, Has a few upgrades including freddy intake manifold and a gtk600. I am about to put in larger injectors, fuel pump, nistune, etc. but im wondering which oil i should run.

Currently im running 20w50 castrol edge non synthetic, this is what the old owner told me to run.

This car is used on the weekends, just as a fun car nothing serious like track days yet.

let me know your recommendation!