Quote:
Originally Posted by 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.
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I have a stage 1 91 octane bm3 tune. I'm still running original spark plugs with no issues it's been 30K miles since install now at 83k. Car runs like stock even under heavy usage. I'm also on the original charge pipe. I'm sure it's a different story if you are running 93 octane.