[mnapuran]

I have a 2004 Mazda6 v6, and I'm wondering what the factory plug is on the car. I assume an NGK, but wanted to check.

And if an NGK, anyone have the Oreilly or Autozone part number for the recommended replacement?

Thanks!

 

[cmorty72]

Motorcraft Finewire Platinum's (8561-05048442).
Supposedly with a gap at .044, but results vary.

 

[mnapuran]

Thanks.... what seems to be the recommended NGK plug replacement?

 

[flipper66]

I love my NGK V-power coppers.(gapped to .052)

the NGK Iriduim IX plugs were horrible when I tried them and came "pre-gapped" too large(.057). They didn't stay in my car 3 days the idle was so bad.

 

[mnapuran]

Thanks... I ended up putting the Autolite XP104's in gapped to about .050

 

[flipper66]

.044 to .052 is acceptable range IIRC. Sounds good.

 

[cmorty72]

NGK Iridium IX's FTW!!

I love my NGK V-power coppers.(gapped to .052)

the NGK Iriduim IX plugs were horrible when I tried them and came "pre-gapped" too large(.057). They didn't stay in my car 3 days the idle was so bad.

Love my NGK Iridium IX's... that is after I re-gapped them to .050 (mine came outta the box pre-gapped to .060!!!).
Been rocking them since Oct. of last year with no issues whatsoever.

 

[flipper66]

Justin and I have had this discussion, I'm not re-gapping plugs that are not supposed to be. Its fine for those who wish to, but I'm not one of them.

I had enough trouble justifying spending 60 bucks on plugs when I made great power on a 20 set.

 

[hardmarker79]

I just also put in Autolite XP104's on my car but I left at with it's .44 gap. Haven't been able to test drive the car though due to some other mishap in the car, but I'll save that story for another thread.

 

[aztrojans12]

I've got NGK Iridium IX Plugs. Been running them for about 35,000 miles with great results. I left the gap as-is and have had 0 issues. I actually didn't even check the gap out of the box which was stupid, but I am assuming it was around .57. Now knowing that others have had issues with the gap, I will probably switch to a different plug for future replacement, especially if other plugs are 1/2 the price (NGK IX are like $7-$8).