Which Sparks Plugs do you recommend?

Looking for your Spark Plug recommendations? Rock Auto offers many brands, looking at the NGK Laser Iridium units. What experiences do you have?

2019 Tundra TRD Sport with the 5.7L.

 

OEM

 

Which are Denso for the 3UR.

So you don’t have to get them at a Toyota dealer, a reputable auto parts supplier can get you the exact same thing.

Just beware of fake / counterfeit OEM and Denso plugs from Fleabay and that big rainforest company, among others.

 

I just had mine replaced with OEM. I figured why take chances with anything else. JMO though....

 

About 50 years ago I learnd from experience to only use the plugs listed by the manufactuer. Have not and will not waver from that rule.

 

How many mikes do you have on it that it needs plugs?

Denso iridium are nice but $$$. Ngk is a solid plug as well.

 

Be wary of throwing tons of money at fancy named spark plug schemes. If your motor isn't tuned for higher compression than stock and you're not running premium fuel, you're not getting any benefits from the laser iridium flux capacitors etc etc... OEM parts will do you nicely if your air intake, exhaust and tuning are still OEM.

 

You want OEM from a trusted (ie: Toyota dealer or Denso authorized reseller. Look on the Denso website for a list of them) source.

In the meantime here's a picture of what you want. The box on the top with the part numbers.

 

I would stick to OEM or NGK. If going NGK then cross reference the number. Both Denso or NGK are great plugs. Me personally, I would also stick to reputable parts sources like other have said.

 

Thanks for the information and I also love the quotes at the bottom. Those are so true.

 

For what it is worth, I went with the NGK Ruthenium (NGK 94122). I don't have any evidence of a benefit, but no issues either.

 

I HATE, again HATE, supporting any dealership cartel but anymore with the utter insanity of fake oil filters and spark plugs from wonderful china please consider buying from a dealership. I understand buying something from crapazon but they are literally selling more fake spark plugs then real. If you see a $12 spark plug selling for $2-$7 then who's fault is it when your truck runs like crap and the more glass then ceramic plug shatters into your cylinder. Even Autozone and the like have been fined for selling fake parts. Buying the welder from Harbor freight that you will use once but saving $1000 is definitely the way to go but saving $25 on eight plugs just isn't worth it.

 

I changed mine at 70,000 miles, used whatever came as OEM...Denso 3421

 

Thank you JonnyT. How many miles do you use on these plugs? The Laser Iridium's (4904) are 6.85 each and Ruthenium’s (94122) are 8.59, no big deal in terms of cost difference.

 

Thank you. Plan to change mine at 60K-70K as well.

 

Agreed. I stay away from dealers and a ton of fakes out there. I only purchase plugs for my vehicles from RockAuto since they are a respected reseller. Unfortunately there is only 1 Denso in stock, will be buying a NGK Iridium or Ruthenium, likely Iridium.

 

Thank you, TundraMcGov. Wish Rock Auto had more than 1 unit in stock. :-(

the Denso site is garabaaage, not finding any reputable retailers to purchase from that have them in stock.

 

Just about to roll 50K miles. With the cost of goods skyrocketing, want to put 8 units in my tool box and change them sometime in 2023. Called my local dealer, 11.50 per OEM plug.

The equivalent NGK Laser Iridium is 6.85 per unit. Likely going with these NGK’s, use them in my Lexus ES, Acura TLX and Honda CRV and they are good. Would certainly rather use the Denso/OEM units but price doesn’t make sense.

 

I'm guessing around 2,000 miles or so. A majority of them were towing our camper this past summer.

 

My local auto parts store carries the Denso Iridium plugs for 10.99 each and if purchased on line I can save 1.65 a plug. I think I will go that route when I need to change the plugs. Also have a rated for 100,000 mile performance.

 

It really is simple isn't it ? People make it way harder than it has to be.....

 

That’s good to know, I’ll call and check my local part stores as well. I’d consider Denso’s at that price as well.

 

What’s the manual recommend for mileage replacement? I’m a 180 miles away or I’d go look.

 

Pretty surer it's 90k could be wrong though.

 

At my current driving rate, there will have been two new administrations in office. I’ll worry about prices then.

 

We've seen many guys on here replace their plugs at 125,000 miles + with no reported deleterious effects. Someone last month said when he replaced his in his bought-used Tundra it was at 223,000 miles and he was pretty sure it was the first time. He may have even of posted a photo or two.

I replaced mine at 70,000 miles just cause I come from a life where plugs got replaced at 30,000 miles and so I wanted to have a look. Judging by how they looked they had pleeeeeenty of life left in them. I won't have any problems running this set 100,000 miles.

 

I did my old 4Runner for the first time at 225k miles. Other than one being carbon stuck in and having to work it out real slowly, noticed zero difference in how it drove. For the most part, as long as they spark and the gap is fine, there isn’t much to go wrong on a plug. Not saying that’s always the case, just 99.9% of them.

 

Manual says 120k miles for spark plugs.

 

This tracks regardless if you vote conservatively or liberally, nice.

 

Same here.