Which Sparks Plugs do you recommend?

FYI the stock plugs are iridium. It has nothing to do with performance, precious metals like iridium or platinum last longer than standard copper plugs. The cheaper copper plugs actually provide better performance since it is more conductive than iridium just the copper does not last as long so service intervals are shorter.

 

This. If you are going to do 50k service intervals, save the money and go copper. Changing iridium’s at 50-70k is just throwing money away.

 

appreciate the insight here everyone. Thank you!

 

https://www.tundras.com/threads/real-vs-fake-denso-plugs-w-pics.60880/

 

OEM from dealer or very reputable source. No need for any other kinds, you will get no benefit.

 

Service intervals for copper plugs is way less than 50k, it would be more like 10k. My Subaru had iridium and service interval was 60k. I'm going to do 60k for the Tundra as well. Not so much because I think the plugs will need to be replaced but I just like to do things and I'd be worried about them being stuck at 120k.

 

I recently bought 6 ngk plugs for my boat and the cheapest by far was directly from NGK

 

It is more than likely fine running plugs for 100k...plugs in my camry look fine...the issue becomes a seized plug in the head, if not seized very very stubborn to get out. Every 25 or 30k i just pull the plugs and reinstall....issue solved.

 

On the 1st gen Tundra V8 with factory copper plugs (00-04), the interval for spark plugs from Toyota was 30,000 miles. That's what I did, and they always looked fine (and gap was ok). I waited until 60k once, and the gap had gotten too wide.

 

Interesting, only vehicle I changed plugs in that has copper is my bike and its 7500, so figured it would have been shorter than 30k but the bike is high compression so I guess it makes sense.

 

I’ve always found 50k worked well for my vehicles with copper plugs. Not certain why your bike says 7500 but I’d imagine high rpm is a factor. More cycles per ignition stroke, more wear on the electrode.

 

Just changed mine at 85k oem denso. Running Like a champ.