Personally feel a plug will perform in relation to your tune . If you run a hot plug its easier its a great option if you need a bigger window. If your able to tune good running a colder plug will have its advantage especially with these CRE mills. I'm not saying you guys can't tune, I'm saying a colder plug has a smaller window its more prone to flame outs if your tune is off. I've been running the werk plugs from day one in humid and hot conditions without issues. I do go back and forth between 5&6 pending on the days weather.