I tried the ngk iridium IX's for FS-DE. Ehh, nothing but more money from wallet. No better mpg, same as the oem BKR5s. The ZFR5s made a noticeable difference in smooth idle but mpg no different than the others. Kind of a wash. Not willing to try any others. Have had Toyotas for 30 years & have found that Japanese cars not to fond of anything other than ngk or nippondenso (aka denso now days). Anything else basically was toast real quick. I tried all kind of different splitfire this & 4 tip that, all BS.Anyone tried Iridiums?
search!Just for everyone's knowledge.
Spark plug="?"
MPG increase/decrease="?"
Power increase/decrease="?"
Response increase/decrease="?"
that's stock!i just put ngk v powers gapped at .43
cleaned up my idle a bit
because you put BRAND NEW stock plugs in!Spark plug= NGK Part # 6953 {V-Power Plug #BKR5E11
MPG increase/decrease=increase but not really noticeable
Power increase/decrease=smoother acceleration
Response increase/decrease=smoother acceleration
Others:
NGK Part # 7090 {GP-Series Plug #BKR5EGP}
NGK Part # 5464 {IX-Series Plug #BKR5EIX11}
NGK Part # 2647 {Platinum Plug #PFR5G11}