Originally Posted by AK370Z

ME and many other 370Z owners noticed that this car takes a while to break in. During the first couple thousand miles I have seen the oil temp gauge climb up literally in front of my eyes. But after switching to a good synthetic oil and 7800 miles later, it's a huge task for me to bring the temps up. I'm averaging 95 degrees outside and I'll be surprised if my car crosses 225 F even after prolonged drive. I say wait till your car has 4-5K miles (completely broken in) and switch to a good synthetic like Redline, RP, Amsoil etc. You'll have MUCH harder time bringing the temp up.