Jul 15, 2018 · What would be a reasonable Iridium Plug change interval? I have Denso Iridium Power II's, which Denso rated for 30k miles back in 2014 or so when I put them in. I rechecked and now Denso Europe gives them just 20k miles. I heard a lot of people claim 60-70k miles on them are no problem. Now the...

May 10, 2015 · Funny, a few weeks ago I bought the same Ruthenium plugs, to replace the Iridium plugs in our '09 Mazda (with the same 2.3 l engine). Per NGK, G-Power Platinum plugs are good for 60K km, Iridium IX 100K km, and Iridium Laser 120K km.

Apr 27, 2010 · The TT series is the aftermarket adaption of the Super-Ignition Plug Denso created for the Toyota D4-S engines, minus the side electrodes. I’ve used the Platinum TTs in a Subaru, haven’t tried the Iridium TT. Denso seems to push them more than Iridium Power. iridium TTs have platinum on the ground electrode, like the OE plugs.

Nov 20, 2006 · Laser has iridium center electrode with small platinum disc welded to the ground electrode. A Mazda TSB from 2012 indicates that this type of plug is required for Skyactiv engines even though NGK's site offers more that one type for those engines.

Oct 8, 2012 · The manual calls for Denso Iridium Long Life plugs to be changed at 160k km. Cars at 320k so second swap and I noticed Denso has new TT plugs with smaller 0.4mm center electrode as opposed to 0.7mm in long life. Previously 0.4mm center electrode is for the "performance" plugs and generally doesn't last as long.

Aug 14, 2015 · Well let's check. I see gaps at 0.040 to 0.044 inches for Iridiums. What other gaps are your owners manuals recommending for Iridium plugs? Not Platinums and certainly not Coppers. '08 G35 with the VQ35HR engine and the FSM calls for Iridium plugs gapped at 0.043". The plug Nissan/Infiniti specs is FXE22HR11 and DENSO pre-gaps these at 0.044".

Mar 19, 2006 · What optical differences distinguish Iridium shields? Do the different colors have the same effects as color tints in my prescription lenses? What advantages and disadvantages exist between these Iridium visors and more common smoke visors? If you want to talk specifics, I'm shopping AGV K6 helmets and one option includes a free Iridium visor.

Aug 5, 2002 · From what I remember the older 0.4mm iridium plugs last about 15-30k miles, but the newer 0.4mm Denso Iridium TT claims 100k miles life vs the 80-100k miles life the 0.7mm Long Life Iridium. They are also cheaper too.

Jun 17, 2013 · iridium plugs helped the OEM's achieve 100+k mile plug changes. Copper will not give a stronger spark, platinum and iridium plugs contain a copper core anyway. Platinum plugs were the first noble metal plugs with a recommended 100K service interval decades before iridium plugs were marketed.

Dec 22, 2002 · Almost all “iridium” plugs use a copper core as it would be cost prohibitive to use iridium for the whole thing. Those “copper” plugs use nickel on the center electrode for longevity as copper would quickly wear out. Iridium has less …