Are NGK and Mopar spark plugs the same?

[14RAM1500BG]

I see mopar shows part number SP143877AB. I see rock auto shows NGK 92145 LZFR5CI-11 Laser Iridium Spark Plug as being the same. Are they different or exactly the same plug for less dollars

 

[Nick_rp]

Yes. NGK manufacturers Mopars plugs and slaps there logo on it

 

[14RAM1500BG]

Ok, that was what I wondering if the parts store NGK plugs were the same quality or if they were a lesser quality. Since if is a bit of a chore to change plugs i wanted to make sure first.

 

[EdGs]

I have a 2015 1500. Just did my plugs.

Got the 92145 from RockAuto.

The 92145 are numbered LZFR5CI-11, and the ones that were in the truck were ILZFR5E 11.

The plugs look identical, but i could not find the number listed on the NGK site for the ones that were in the truck. The only listed number close to ILZFR5E 11 (ZFR5E 11, I think) were a standard copper. No way would those have lasted 100k miles. So, it must be a custom number on the same part.

0 problems with the 92145 also. If you dont already have it get the gearwrench magnetic swivel extension, made the job MUCH easier.

 

[EdGs]

GEARWRENCH 3/8" Drive 6 Pt. 5/8" x 6" Magnetic Swivel Spark Plug Socket - 80546

Search the Gearwrench 80546 on amazon. Should be about $12

 

[Nick_rp]

Ok, that was what I wondering if the parts store NGK plugs were the same quality or if they were a lesser quality. Since if is a bit of a chore to change plugs i wanted to make sure first.

NGK are, in my opinion, premium plugs. Even there cheapos are quality

 

[Jendsley06]

I know it's in the book somewhere, but what is the recommended mileage for first plug change on these jeni's? I had a 5.4 triton in my ford before this truck, and the PO waited too long to change and I got stuck with the normal problems with them. Not that these will be as bad, but would rather change them before due than wait too long. About 74k miles on the odo now

 

[EdGs]

100,000 miles for my 2015 Ram 1500 5.7L

 

[Nick_rp]

Your 2018 should be running iridium plugs which are 100k intervals

 

[RedSRT4Me]

You can push it past 100,000 on a stock or bolt-on truck with iridium plugs. My truck is a 2015

Save the $130 unless you have a 2013 or older that had copper plugs.

This is my first time dealing with iridium plugs. I had always believed in copper since I did lots of drag racing with the SRT4. Since I was always pushing that 4cyl I went through quite a few plugs.

For the Ram the iridium plugs either work or they don't. Even at 100,000 I don't think any of the 16 plugs lost gap.


They all measured with .043 - .044 which is acceptable room in error.

I would recommend saving the money on plugs unless of course you're running a nitrous or boost scenario.

 

[Nick_rp]

You can push it past 100,000 on a stock or bolt-on truck with iridium plugs. My truck is a 2015

Save the $130 unless you have a 2013 or older that had copper plugs.

This is my first time dealing with iridium plugs. I had always believed in copper since I did lots of drag racing with the SRT4. Since I was always pushing that 4cyl I went through quite a few plugs.

For the Ram the iridium plugs either work or they don't. Even at 100,000 I don't think any of the 16 plugs lost gap.
View attachment 234461

They all measured with .043 - .044 which is acceptable room in error.

I would recommend saving the money on plugs unless of course you're running a nitrous or boost scenario.

I hear what your saying, i respect your experience and i dont mean sound like a **** but yea they still look good but the point of service intervals is to prevent failures before they start and $130 every 100k miles is completely acceptable in terms of prevention. IMO anyway.

I know Mainstream iridium intervals are crazy wide, between 60k-150k but not all vehicles are built the same

 

[RedSRT4Me]

I hear what your saying, i respect your experience and i dont mean sound like a **** but yea they still look good but the point of service intervals is to prevent failures before they start and $130 every 100k miles is completely acceptable in terms of prevention. IMO anyway.

I know Mainstream iridium intervals are crazy wide, between 60k-150k but not all vehicles are built the same

Well said I appreciate the opposition. I think your opinion versus mine should help readers make up there minds on changing out spark plugs.

As a test not that I would personally do it but I'd be curious to see how long 16 iridium plugs last till failure. The plugs I presented have 100,000 which to the experienced eye realizes you could still get more life out of them. Depending on how frugal you are of course.

 

[RedSRT4Me]

Side note. These plugs have gone through full tanks of E85, octane boosters and the like. I was not kind to those plugs.

Some may ask why e85?

Simple. Horsepower. I was testing out all of the myths people say not to do with e85. Now for the mass I would still follow this logic of not using it. But me? I don't think there has ever been a time in my life that I listened to authority.

While I didn't know exactly what would happen I had my theories on the test. I also knew that if for some reason I broke something I could fix it.

How does e85 make horsepower? Easy the octane rating of e85 is around 105. When you have the ability to flash the vehicle to take advantage of that the truck will run more timing to make more horsepower without detonation. Make sense?

Then the naysayers but but but gas mileage!?!?!
Yes e85 burns 30% faster. My mpg went down to about 9 although I'm not quite sure if that was from the fuel or my foot come to think of it.

With that said I have multiple tunes loaded to my i3 Diablo tuner that I can flash in about 20-30 minutes. It's by no means like one of those e85 kits sold where they are selling you a tuner in a box with the ability to change fuel type on the fly but it gets the job done.

Who would this fuel be ideal for? Turbos, supercharger, nitrous, or people who don't give a f#ck .

Why does all of this matter??
Because those plugs went through all of that and I'm disappointed I changed them after looking at their condition.

 

[Nick_rp]

Well said I appreciate the opposition. I think your opinion versus mine should help readers make up there minds on changing out spark plugs.

As a test not that I would personally do it but I'd be curious to see how long 16 iridium plugs last till failure. The plugs I presented have 100,000 which to the experienced eye realizes you could still get more life out of them. Depending on how frugal you are of course.

In theory, i go by the book. In real life, im a lazy **** who dosnt do things when i should lol i really tried to be cordial, i must of typed that 4 different ways but reading it again it still sounded ******* so i appreciate the response.

Failing plugs is one of those things that can cause other components to fail as well like an incomplete combustion will foul cats, clog emissions etc so thats why plugs is something ill always try and stay on top of and not risk going to far over. I dont like chasing a slew of problems that i could of prevented