Spark Plugs

[redrockv8]

I went ~90k on my first set of iridiums, and they still looked good when I pulled and replaced them.

I have a 2014 Grand Cherokee with hemi. I was told I have iridiums and that they are standard in all 2014 hemi's. Service dept at dealer checkd my VIN to veryify I had iridiums. He said they are good for 100,000 miles. Prior to 2014 only police package hemi's were equiped whth iridiums.
I already have it in my head that I want a 2020 Grand Cherokee so (I'm old and this will be my last hurrah)I'm sure I'll have the new one before I reach 100,000 miles on this one.
Maybe by 2020 they will wise up and produce another Commander. I'd buy one in a heartbeat.
HT

[The_War_Wagon]

Got a friend (he's from Liberia, and not really up on Jeeps!!!) with an '06 5.7 WK that needs plugs. I'm gonna help him, so any recommendations is welcome!

[paroxysym]

BUMP, are you guys changing your plugs at 30k?

just changed mine at 90k, just rolled 120k

[andyb]

I changed mine at around 90k, and dang were they shot, haha I have no idea is any of the previous owners had ever changed the plugs. 30k seems reasonable to me. Heck why not? <$20 for Champion stock replacements.

[The_War_Wagon]

BUMP, are you guys changing your plugs at 30k?

just changed mine at 90k, just rolled 120k

Changed mine @ 60k, because that's when I bought it. ALMOST to 80k now - got a while 'til the next batch.

[lekmedm]

If you are running OEM copper plugs, change every 30k miles. If you run iridiums, you can change every 100k miles!

[The_War_Wagon]

If you are running OEM copper plugs, change every 30k miles. If you run iridiums, you can change every 100k miles!

Well that's what I THOUGHT, but I wasn't sure. I switched to NGK iridiums when I changed mine at 60k.

[sean112280]

I have the 4.7 with the copper plugs. can somebody help me verify what the gap should be? I am double checking. thanks