Hello, I hope everyone is well today and enjoying the day. I have a 370z with a oil cooler installed and had a few questions which I know I could get some insights on. The first question is pertaining to the oil cooler I have installed on the car. It's a 19 row cooler with a setrab core. The 370z is notorious for running hot, hence the oil cooler was installed. Now with the oil cooler installed, does this help increase the engine oil life? With this is mind does that mean I can confidentially stick to a 5w30 weight oil without it breaking down quicker than usual? The second question I have is about oil weight. Usually I am running Motul 5w30 x-clean but this time my mechanic threw in Liqui Moly 5w40. Is there any damage that could be caused to the engine by running a thicker oil? I've also heard about 0w40 weight oils such as Mobil 1 and Castrol Edge that sheer down to 30 weight oils, could I run those in my engine without causing damage? Keep in mind I have a oil cooler, would that mean that those 0w40 oils would sheer down slower to a thirty weight thus potentially causing damage? I would like to thank you folks in advance for your time and inputs, they are greatly appreciated. I look forward to getting to know this community and contributing accordingly. Cheers!