Since they are colder plugs, depending on when you plan to get tuned, you run the risk of fouling, which could lead to misfires. I would hold off until the week you plan to get tuned. I wouldn’t change them out until maybe a few days before.

 

Hello All,

Manic (running a Manic Tune) recommends replacing plugs at about 10K miles, which I just reached after 7 years.

I haven't looked at them yet to check their condition (looked fine last check).

What are folks thoughts on replacing at 10K?

Don't want to remove them and need replacements.

Cheers!

 

Are you running a stage tune from Manic? I replace my spark plugs every spring as cheap insurance. The 1422's can be had for ~$50 per set directly from NGK, so why not. I drive at least 10k miles per year.

 

I take them out at 5k, along with oil change and tire rotation, and check the gap/general condition. I always have an extra set handy, mine have been in over 10k now and i'm not having problems but they are cheap insurance for sure.

 

Thanks all, ordered another set just in case.

Cheap insurance as you say!

 

Based on experience, more boost is hard on plugs. I’m only on my second set of 1422s with an RPM stage 2 in a 2013 N18. The first set was in for close to 20K, which in hindsight was clearly a mistake.

 

I changed my plugs last weekend with ~30k on them and should have changed them sooner, car runs smoother now, but wasn't giving "problems" per se with old plugs.

 

Hello,

Just a heads up that we have seen a bunch of MINI factory spark plugs now come as Champion which is now OEM, we are seeing it on some older plugs also. Its champion France so its fancy unlike your lawnmover spark plug.

Not to make things more confusing for MINI, but they like to change supplier.