I went to these after boschs so I did notice gains at that perspective. and yeah -6 outside and it started like it was garage kept. Chips might tune your timing specs. Well thats actually the point of them. Pinging needs a higher octane than what your using from what I know. Some chips might need to reset. some might need even higher octane. Still sticking to my unresearched guns that chips might not like them, especially if they do run hotter than other plugs. I almost think its solely the reason. I reset my chip but we know the jets dont work after a month. the computer relearns it by bypassin it. Other chip and ecu tunes are not reset or arent designed with that heat range possibly. I might just see it different. Im by no means a mechanic. I self teach my self and build my truck my self. Best trucks are built right lol? IMO here. just a common sense thought. If not true, im open to learn.