Best kind of Spark Plugs? - Pontiac G6 Forum
 
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post #1 of 11 (permalink) Old 03-10-2013, 02:16 PM Thread Starter
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Best kind of Spark Plugs?

I'm putting my Crabs intake on in the next few weeks and was curious if anyone has any recommendations on spark plugs? I don't think they've been changed since the car was made to be honest. My fuel economy is horrid. I would like performance ones if possible. Thanks!

3.5L V6 Engine

2008 Pontiac G6 GT Coupe

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post #2 of 11 (permalink) Old 03-10-2013, 05:55 PM
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I know a lot of people like NGK Iridium plugs. I'm using Autolite double platinums right now. Theyre a decent plug. I dont have any mods tho.
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post #3 of 11 (permalink) Old 03-10-2013, 07:21 PM
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NGK Iridium seems to be most preferred.
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post #4 of 11 (permalink) Old 03-12-2013, 12:57 AM
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Re: Best kind of Spark Plugs?

I've been running NGK iridium IX for a while now with no issues.
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post #5 of 11 (permalink) Old 03-13-2013, 08:51 AM Thread Starter
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Cool thanks guys. I'll go with those. Does anyone have any info on installing them on the coupes?

2008 Pontiac G6 GT Coupe

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post #6 of 11 (permalink) Old 03-13-2013, 10:20 AM
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08 3.5 LZ4 .....Yeah get ready for one hell of a time getting the back three boots off.

2007 PONTIAC G6 GT

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post #7 of 11 (permalink) Old 03-13-2013, 08:01 PM
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Originally Posted by waterfowler76 View Post
08 3.5 LZ4 .....Yeah get ready for one hell of a time getting the back three boots off.
Take off as many parts as you can to gain better access then have lots of patience and eventually they'll come off.
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post #8 of 11 (permalink) Old 03-17-2013, 06:57 AM
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Interesting that most folks don't stick with the OEM delco plugs. I'm up to nearly 50K miles and am planning to change the plugs as it's been 7 years! I might use NGK as it's what I use in my other vehicles.

'11 Ram SXT 4x4 quad cab - 5.7L V8; 128,200kms
'09 Malibu 2Lt 3.6L - 140,000kms purchased 1 March 2019

'06 Pontiac G6 GT - 3.5L V6; 162,000kms (rear ended 15 Feb 2019, and given totalled title by insurance)
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post #9 of 11 (permalink) Old 03-17-2013, 12:30 PM
 
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I just changed the back three on mine at 33,000 miles while I'm changing the crossover pipe gaskets. I had to remove the alternator, and so much other stuff that I could easily get to the rear plugs. The stock AC Delco plugs are Iridium, at least on my '08 3.5, and show absolutely no wear or gap change. They are designed to go 100K miles, and probably will just fine. I put the same part number Delco plugs back in.
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post #10 of 11 (permalink) Old 03-17-2013, 02:32 PM
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Quote:
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Interesting that most folks don't stick with the OEM delco plugs. I'm up to nearly 50K miles and am planning to change the plugs as it's been 7 years! I might use NGK as it's what I use in my other vehicles.
Pretty sure the OEM plugs are made by NGK iirc
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post #11 of 11 (permalink) Old 03-17-2013, 04:00 PM
 
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Pretty sure the OEM plugs are made by NGK iirc
You are correct! The AC Delco plugs that I removed are stamped "IZTR4A11", and "Japan" on their shells. NGK's best $9.99 Laser Iridium plug listed for the 3.5 engine is the same exact part number. But, the AC Delco's price is $3.00 per plug cheaper!
BTW, the NGK Laser Iridium is a better, and more expensive plug than their Iridium IX plug.
All prices are courtesy of O'Reilly Auto Parts.
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