I have only used Bosch plugs in my cars, and I have not had any issues with them yet.
Bosch iridiums, these for longevity, copper ones have better spark if your concern is performance
Today I installed new spark plugs and the misfiring situation has improved significantly but is not completely gone. If I pull up the RPM too quickly the misfire counter goes up.
I just replaced my oem densos with some Bosch plugs that were labelled as being pregapped 1.1mm. I wanted them to be 1mm and checked with a gauge and Lo and behold they were already at 1mm. Whacked them in and improved my fuel consumption immediately.
I took it back in after setting the DPR to 2.5± 2.5 mA, checking again for any vacuum leaks, tightening down all the exhaust components, and changing out the spark plugs (again). I also checked the O2 sensor, it was fluctuating between .1v-.7v continuously.
They're both fine brands, I doubt you'll notice a difference. NGK is most likely OEM for your Civic, but it's not like Bosch is bad, they're OEM in my BMW.
The Neuspeed chips don't perform well at all, and the 2.0's do best with BOSCH FR8DS's.
Yeah I own and operate an auto repair facility and refuse to use Bosch plugs because I’ve had a lot of issues with them in the past. Misfires mostly.
I've heard for many decades how bad Bosch spark plugs are and I figured the coils would be just as bad, if not worse.
Bosch spark plugs are junk.
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