I'm currently running Pennzoil Platinum 5w30 in my car, but on my used oil analysis from my last change at 5k, the oil viscosity had dropped out of spec. The car is tuned and pushing more boost than stock, I don't beat on it, but it does get the throttle pushed hard now and then. From what I understand on here, PP tends to be on the light side of a 30w to start with. I'm wondering what other easily attainable oil you would recommend for me to use? I was looking at M1 and Castrol Edge, not sure if there's a tangible reason to go with one over the other.
Thanks.
Thanks.