I broke mine in on 20w-50 brad penn but oil pressure was pretty high.

1150 idle, 49psi

2000rpm 70psi

7600rpm 78psi

(I think it was just going through the bypass pretty early)

I've since switched to Royal Purple XPR 5w-30 and will dyno again soon.


69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700