2013~2016 Skyactiv Spark Plug Question

Hello I would love to get confirmation from the group about the correct spark plugs for a 2014 Mazda CX-5 2.5 touring model. I have reviewed the forum over and over and it can be conflicting.

From Mazda OE 1 spark plug is 30 bucks. However rock auto shows the
NGK 94124 {#B2401HA00F, PE5R18110} Laser Iridium Info
Gap 0.044"; Actual OE Part

This plug is 9.15 for 1 so a savings of 80 bucks. I have heard that we should stick with OE part since th skyactiv engine can have specific specs for this plug? Can someone confirm this for me. Also where do I find the torque specs for this? I assume the manual but I couldn't find it. The dealer wanted 350 for fuel servicing that included spark plug replacement and assume a fuel system flush which I expect isnt necessary but the spark plugs are def due for a replacement and it seems like a pretty simple procedure I just want to make sure I get the right part!

Thanks!
 
For SkyActiv-G 2.5L the OEM spark plugs have 2 types: PE5R-18-110 and PE5S-18-110. PE5R-18-110 is made by NGK and PE5S-18-110 is made by Denso.

The NGK equivalent for PE5R-18-110 is NGK Laser Iridium spark plug ILKAR7L11 / 94124.

The Denso equivalent for PE5S-18-110 is Denso ZC20HPR11.

The torque spec on spark plug for 2.5L is 12~14 ft/lbf. A 14mm thin-wall spark plug socket is needed.

2016 spark plug torque

For spark plug gap, on PE5R-18-110, PE5S-18-110:
Standard: 1.05—1.40 mm {0.0414—0.0551 in}
New spark plug (reference): 1.05—1.15 mm {0.0414—0.0452 in}
It appears replacements can be any of the following. Might be able to track down proper socket that way.

PE01-18-110, PE02-18-110, PE5R-18-110, PE5S-18-110

This is from the FSM.

Spark plug gap [PE01-18-110, PE02-18-110]
Standard: 0.75—1.10 mm {0.030—0.043 in}
New spark plug (reference): 0.75—0.85 mm {0.030—0.033 in} Spark plug gap [PE5R-18-110, PE5S-18-110]
Standard: 1.05—1.40 mm {0.0414—0.0551 in}
New spark plug (reference): 1.05—1.15 mm {0.0414—0.0452 in}

As for whether or not you should use OEM spark plugs or aftermarket NGK or Denso plugs, it’s your call.
Until I know that non oem plug meets the workshop manual resistance of 3.0*7.5 kilohms) I wouldn't use a non OEM plug. The ecu uses the spark plug as primary knock sensor. If the resistance is out of spec then you could end up losing power and or mpg. I've been meaning to buy a cheap plug from Vatozone and test the resistance.
What Chris_Top_Her has said does have his base. OVT (OrangeVirus Tuning) had posted following comments several years ago here.
Without getting into too much detail...you guys really...really..really want to use OEM plugs....
the reason is because the ECU uses the ignition coils, which measure a resistance across the OEM plug for pre-ignition, and extremely low levels of knock retard the knock sensor cannot pick up, along with that it gives the ECU individual cylinder information, the spark plugs are actually used "as a sensor."

How it works exactly is proprietary information that I am not willing to share, you want to use OEM plugs.
 
I just replaced my plugs here at 60k on my 2016 2.5L.

NGK Direct replacement as stated above on rock auto. 94124

The spark plugs require a DEEP 14mm socket. My 3/8 drive deep 14mm sockets were not deep enough, so I had to purchase a 1/2 drive deep socket to accomplish this task.

With the 8mm socket for the coils, and the 14mm DEEP for the plugs, it is a simple task that can be completed in under 10 minutes.
 
I used the Denso plugs that Yrwei referenced above. I have about 20k miles on them. No issues. Same mpg.
 

With the 8mm socket for the coils, and the 14mm DEEP for the plugs, it is a simple task that can be completed in under 10 minutes.
So what kind of 14mm DEEP spark plug socket did you get?
 
Looks like the same socket I recently used for the spark plugs on my '07 Infiniti G35x w/VQ35HR.
 
I'm still gonna do OEM plugs next year.... knock on wood but even with my complaints about it at times vehicle has overall had a low TCO

I'm at shy of 67k miles

PE5R-18-110



 
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I'm still gonna do OEM plugs next year.... knock on wood but even with my complaints about it at times vehicle has overall had a low TCO

I'm at shy of 67k miles

PE5R-18-110

That's up to you. I went the NKG route and can tell absolutely no difference from the originals. That was 20K miles ago.
 
My 2016 CX-5 sport 2.5L has about 64k. When do I change the plugs? At 100k?
 
A vehicle spark plug change I won't dread... about as simple as they get.

Last vehicle I had this easy was my wife's old '96 Protege LX (her first new car). We sold it back in 2007.

Transverse V6s have been the worst for me.
 
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So when changing spark plugs for the '16 CX-5 sport, do we need to apply the anti seize?
 
So when changing spark plugs for the '16 CX-5 sport, do we need to apply the anti seize?
There was no mention of it in the official procedure, so I did not use any myself.
 

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