What spark plugs you recommend for 2015 Mazda5- 93k miles?

Thanks in advance

 

New ones!

 

ha ha! Can I use Iridium ones irrespective of what I have now? the manual doesn't prescribe any particular one unfortunately

 

The reason there is nonspecific spark plug type is because there is no "set" requirement except the suggested make and part number. So technically whatever the Spark plug manufacture list for your "engine" can be used. Most information on the internet about spark plug choice and use is really "white noise".
So I would say use the *K.I.S.S. (*keep it simple stupid ) method of choosing.

 

https://www.ngk.com/application/search

 

thank you very much folks