Originally Posted by FocusBoy58
Actually anything before spark blow out is the best you cant just put a certain number on it. Some cars blow out sooner then others. .010 is playing it safe past that you get towards the area that you could have inability to make park. But mine are at .060 with no issues right now.
I understand that, but your also going to have to replace your sparkplugs more often too as they will wear faster. And the more you tinker with that the more risk you run breaking a plug or causing damage Ford will not cover.
I would caution people to do a lot of research on any mod and if it comes down to it and the information provided is right then you can feel good that you did the right thing to your car.