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#4675654 - 02/23/18 04:07 PM Motorcraft made in Japan spark plugs
Whimsey Offline


Registered: 12/22/02
Posts: 4012
Loc: The Garden State
I recently ordered Motocraft SP-537 (CYFS-12Y-2) spark plugs for our 2.3 EcoBooost. They are Iridium fine wire on the firing portion only, the ground appears to be nothing special. I just found it interesting that these plugs are made in Japan for Motorcraft. I wonder if they are Denso or NGK made. I wonder if the factory plugs are the same.

Whimsey

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#4675678 - 02/23/18 04:33 PM Re: Motorcraft made in Japan spark plugs [Re: Whimsey]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 5817
Loc: USA
The factory plugs are the same NGK iridium as the Motorcrafts you just ordered smile

You will see the code LTR6DI-8 on the side, right between the nut and the ceramic insulator. The 6 indicated the heat range (on NGK's scale, higher number heat range is colder), and the 8 means .8 mm gap

The NGK part number is 96588

Somehow, the OEM Motorcraft (and ACDelco for GM) NGK-made iridium are priced lower than the NGK-branded ones in the NGK box crzy

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#4675773 - 02/23/18 06:35 PM Re: Motorcraft made in Japan spark plugs [Re: slacktide_bitog]
Whimsey Offline


Registered: 12/22/02
Posts: 4012
Loc: The Garden State
Originally Posted By: slacktide_bitog
The factory plugs are the same NGK iridium as the Motorcrafts you just ordered smile

You will see the code LTR6DI-8 on the side, right between the nut and the ceramic insulator. The 6 indicated the heat range (on NGK's scale, higher number heat range is colder), and the 8 means .8 mm gap

The NGK part number is 96588

Somehow, the OEM Motorcraft (and ACDelco for GM) NGK-made iridium are priced lower than the NGK-branded ones in the NGK box crzy


Thanks. For these Motorcraft iridium plugs I paid $4.63/ea through Rock Auto. Seemed like a good price for these plugs.

Whimsey

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#4675802 - 02/23/18 06:59 PM Re: Motorcraft made in Japan spark plugs [Re: Whimsey]
PimTac Offline


Registered: 03/04/17
Posts: 3441
Loc: Soviet State of Washington
Originally Posted By: Whimsey
Originally Posted By: slacktide_bitog
The factory plugs are the same NGK iridium as the Motorcrafts you just ordered smile

You will see the code LTR6DI-8 on the side, right between the nut and the ceramic insulator. The 6 indicated the heat range (on NGK's scale, higher number heat range is colder), and the 8 means .8 mm gap

The NGK part number is 96588

Somehow, the OEM Motorcraft (and ACDelco for GM) NGK-made iridium are priced lower than the NGK-branded ones in the NGK box crzy


Thanks. For these Motorcraft iridium plugs I paid $4.63/ea through Rock Auto. Seemed like a good price for these plugs.

Whimsey




That is a great price for iridium plugs.
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