My car with 4 cyl. non turbo 2.4L GEMA engine is due for its 3rd plug change next month at 90K miles. It came with OEM NGK conventional v groove nickel electrode plugs with 30,000 mile change interval (aka "copper" plugs). I'm itching to try the new Ruthenium plugs.
This following 2014 thread with similar question has a high consensus of "only use OEM" for numerous reasons (i.e., best design/match for that engine/no performance gains, only longevity with precious metal): https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3354337/1
vs. Molakule's recent thread describes that fine wire plugs have better spark, maybe better combustion = better performance?: https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5322738/spark-plug-tips#Post5322738
Which is it? OEM for this simple engine for best performance or something else? Plug change difficulty is NOT a concern. Cost difference is negligible IF I run the non OEM plugs 2x - 3x the OEM recommendation of 30K.
Comparison: cost per 4 delivered (Rock Auto)
V power.......... ZFR5F-11........$10.79........OEM 30K interval........Nickel center, nickel ground
G power...........ZFR5FGP.........$12.87........40K? interval...............Platinum center, nickel ground
Iridium IX..........ZFR5FIX-11......$28.67........40-50K interval...........Iridium center, nickel ground
Ruthenium...... FR5AHX............$35.63........80-100+?interval.......Ruthenium center, platinum ground
Laser Platium...PZFR5F-11......$40.31.........80-100 interval...........Platinum center, platinum ground
Laser iridium not listed for this app.
Thank you!
This following 2014 thread with similar question has a high consensus of "only use OEM" for numerous reasons (i.e., best design/match for that engine/no performance gains, only longevity with precious metal): https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3354337/1
vs. Molakule's recent thread describes that fine wire plugs have better spark, maybe better combustion = better performance?: https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5322738/spark-plug-tips#Post5322738
Which is it? OEM for this simple engine for best performance or something else? Plug change difficulty is NOT a concern. Cost difference is negligible IF I run the non OEM plugs 2x - 3x the OEM recommendation of 30K.
Comparison: cost per 4 delivered (Rock Auto)
V power.......... ZFR5F-11........$10.79........OEM 30K interval........Nickel center, nickel ground
G power...........ZFR5FGP.........$12.87........40K? interval...............Platinum center, nickel ground
Iridium IX..........ZFR5FIX-11......$28.67........40-50K interval...........Iridium center, nickel ground
Ruthenium...... FR5AHX............$35.63........80-100+?interval.......Ruthenium center, platinum ground
Laser Platium...PZFR5F-11......$40.31.........80-100 interval...........Platinum center, platinum ground
Laser iridium not listed for this app.
Thank you!