Hello there, I know that HONDA suggests to use NGK PFR7G-11S, (or the denso) but my car came up with NGK's PFR6G, which are as I assume similar, but with different heat range. Should I switch to the 7Gs or leave the 6Gs as there are?
Thanks
nik

 

The 6's are going to be a hotter plug, which may cause more detination than with the 7's. If your car is totally stock and you use quality gas you should be fine, but it deffinately wouldn't be a bad idea to switch over to the 7's.