Hi. 2022 CX30, non-turbo 186-hp 2.5L DOHC16-valve inline 4-cylinder. I'm having a not-so-smart moment. Owners manual page 6-4 spark plug replacement intervals are for Except SKYACTIV- G 2.5T and SKYACTIV- G 2.5T. I'm assuming the 'T' is turbo, which I do not have. So what's the difference between the two engines listed? And if the 'T' is for turbo, what are the non-turbo spark plug intervals. Thanks for any suggestions.

 

For best engine operation +achieving the highest power output and MPG and lowest emission change the spark plugs every 10k mils. No longer then 15k miles.

I recommend do not go by the service recommendation as it is set for the longest period of time which general does not take into account for the first part I mentioned.

Many owners always seem to state or brag the ridiculous miles they get on spark plugs and often claim that they have no adverse effects on high milage spark plug and they would be accurate. That is because they don't notice the slow and constant direct effects of waiting and going so long of service use with spark plugs. The signs of spark plug no matter waht brand or type can easily be seen on a ossiscope at about 5-7 miles of use and the decline from that point forward.

The though behind changing Turbocharged or Supercharged engine spark plugs sooner in service manuals is basically what I stated. Bo those types of engines even for normal daily driving when you get into even small amounts of boost wear a sparkplug out sooner than with a carbureted or normally aspirated engine.

Spark plug changing has "always" been the easiest (inmost all cases) service to do as well relatively inexpensive service to regain the best overall performance level of any engine.