It's all about what you are going to ask of the car. I went years without one on my Z. Did fine for daily driving. But if I wanted to really hammer on it for more than a few turns, she started pulling timing really quick, especially in the Texas summer heat. For example, the one time I got it out on the track while she was still my daily, I did one warm up lap and by the third full speed lap (with traffic) she was in limp mode on the back straight at COTA. I backed off right away and only experienced any rev-limiting at 5000 RPMs.
Now that I no longer daily drive the Z, I am looking to get her out on the track a lot more. So I purchased a 34 row Fast Intentions oil cooler that will allow me to do more than 3 laps at full speed
