So my cruze is tuned on 18-20 psi of boost. Stock is around 12 psi. Im currently using penn euro 0w40. I was thinking on next oci to switch to pp 5w30 or pp 10w30. Im just wondering why the pp 10w30 doesnt meet Dexos1g2 or any dexos. Does it have the same specs to meet like timming chain wear as 5w30 does? Im jw if i could use 10w30 for the lower noack but still have great protection. Someone also said that the 0w40 in my cruze will cause a little more turbo lag. They said because i have a variable volume oil pump it will make a bigger load on the engine to pump the thicker oil. I can see where hes comming from but i cant image that the butt dyno could feel that.