[Tirish1]

I just got off the phone with a local import shop. I just got stage 1 bm3 tune on my 2015 x5 f15. I want to change the spark plugs as I have 80k miles. I told them that from reading I wanted to go 1 step colder plugs due to the tune. He said unless you're racing or going to the track frequently which I don't he doesn't recommend colder plugs and oem will work just fine. Anyone have any insight on this? The car doesn't really get beat up. I just wanted some more hp and torque as my daily driver.