I have both vehicles and assume they are the same but want to confirm.


Thanks.

 

NGK Laser Platinum Part Number: PTR5F-11 , stock # 6579, Gap .044
NGK Laser PlatinumŽ Spark Plugs

I am using the iridiums.

 

Any thoughts on the following?
NGK Part #6579 PTR5F11 Laser Platinum: $9.70
NGK Part #7397 Iridium IX: $6.51
NGK Part #6044 ITR5F13 Laser Iridium: $9.87
NGK Part #90813 Laser Iridium: $5.65

The #90813 Laser Iridiums seemed like a god price so I contacted NGK and asked the following:

VehicleType: Car
Make: Mazda
Model: 6
Year: 2005 and 2006 models
Engine Type: 3.0 L V6

Comments: A major online auto parts retailer lists two different NGK Laser Iridium spark plugs for my application. The part numbers are 6044 and 90813. The features listed are identical:

Information for NGK 6044
Laser Iridium
Laser Iridium? spark plugs provide superior ignitability and long service life. Smallest tip diameter available Iridium / Platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions ? Laser welded Iridium center electrode tip ? Platinum disc welded to backside of ground electrode provides long life ? Trivalent Metal Plating for superior anti-corrosion and anti-seizing ? Tapered ground electrode to minimize quenching ? Consistent and stable spark ? Faster starts and quicker acceleration ? Better fuel economy and lower emissions

Information for NGK 90813
Laser Iridium
Laser Iridium? spark plugs provide superior ignitability and long service life. Smallest tip diameter available Iridium / Platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions ? Laser welded Iridium center electrode tip ? Platinum disc welded to backside of ground electrode provides long life ? Trivalent Metal Plating for superior anti-corrosion and anti-seizing ? Tapered ground electrode to minimize quenching ? Consistent and stable spark ? Faster starts and quicker acceleration ? Better fuel economy and lower emissions

However, part number 6044 is priced 58% higher. Can you tell me if there is a significant difference between these two spark plugs and if both are suitable for my application?

Thank you.

NGK's response:

Hello,

The new number for this application is a 90813. As far as the precious metal types and the configuration the two are the same. As far as the price is concerned I am not sure as I do not handle pricing.

Best Regards,

Jason Norwood
NGK Spark Plugs ( USA) Inc.
Technical Services Administrator - Aftermarket Division
46929 Magellan Drive
Wixom, MI 48393
Office: (248)-926-7107
Fax: (248)-926-6938
Email: jnorwood@ngksparkplugs.com
ASE Certified
Ngksparkplugs.com

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Quote:

Originally Posted by UseYourNoggin

NGK Laser Platinum Part Number: PTR5F-11 , stock # 6579, Gap .044

 

I am currently using: NGK iridium # TR5IX, # 7397, .6mm tip. Got these installed Feb 2013. Love them. I however am using some rather hi potent Accel Ignition Coils as well. Accel part # 140032 (2 Valve for Mustang---reverse wires going in to coils and re-use stock Mazda boots). The 2V coils are angled a bit and slightly hit on back of intake plenum---can be remedied by cutting off top part with side cutters---these have hold-downs but wires need to be reversed--tricky to do but possible---the 4V MUSTANG coils aren't angled and fit better but you need to make a hold-down (last pic).

I like my current iridium ones because of the 6mm tip, i am leary of a smaller tip, especially with the hi power I currently have. No misfires here!

 

Both of my 6s are bone stock. $5.65 ea. For iridium plugs is a good price. Also, NGK didn’t reveal any differences between the #6044 and #90813 PNs so that may be the way I go on the next tune up.

 

If you look at previous chart on earlier post the spark plug gaps are .044.
The spark plug gap on the 90813 is .052. Adjusting the plug gap on an iridium plug is a no-no!
.052 is a big gap for an old worn out stock ignition coil. I would not put a large gap plug on an old worn out ign coil!
Click on NGK site and do your own search, I did and it came up origianlly around .044 gap as per previous post.

SEE specs: NGK 90813 TR5AI-13 Spark Plug

The 6044 has a gap of .051
SEE specs: NGK 6044 ITR5F-13 Iridium Spark Plug

My 7397 has a gap of .040
SEE specs: NGK 7397 TR5IX Iridium Spark Plug

 

Agreed. .052" is too wide of a gap for an OEM coil to jump. Thanks for the heads up.