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Discussion Starter #1
ive searched with no good results..
for those of you that are spark plug changers..what did they look like at 30 k miles...are they worn or can they go 50 or 60 k....my last sonoma had 100 k plugs...tks in advance
 

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08 Tacoma Access Cab
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118 Posts
Here is mine just after 10000 miles



Notice that they are two different type plugs. And all the gap sizes were off.

I now run all Denzo copper, gapped @ .40

The Denzo Iridiums are the high milage plus recommended for our taco's. Personally I rather check up on em every 30K or so. 100k is a bit to much IMO Iridiums or not.
 

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Griff
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Notice that they are two different type plugs. And all the gap sizes were off.

I now run all Denzo copper, gapped @ .40

The Denzo Iridiums are the high milage plus recommended for our taco's. Personally I rather check up on em every 30K or so. 100k is a bit to much IMO Iridiums or not.
you bought this truck new? if you did, why in the hell would toyota/dealer put different plugs in? that's retarded. :confused:
 

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08 Tacoma Access Cab
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you bought this truck new? if you did, why in the hell would toyota/dealer put different plugs in? that's retarded. :confused:
I am not the first to discover this...

But +1 it is very retarded. And yes I speacial ordered my Taco.:D
 

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Discussion Starter #5
you will have to ask toyota that question..ive seen on here befor thats the way they come from the factory
 

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It is strange,but I read somewhere the reason was to keep the 2 suppliers happy.Makes no sense to me,why not just alternate every other truck instaed of mixing 2 brands in 1 truck.Who knows?
:confused:
 

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Native Oregonian
07 Tacoma DC LB TRD
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785 Posts
Mine were different brands as well between the left as right banks, as pictured above.

I pulled them out around 50k and the gaps were huge. Made a little difference in the mpg. I bought the pre-gapped Denso Iridiums as well.
 

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Take off, eh!
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And it's not just a US thing (like the oil change light, which doesn't seem to come on for us up here) - when I changed mine, I had different brands in each bank as well.

cheers
 

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I would think it's not to make the suppliers happy but to keep a discount for large quantities. Maybe NGK is used for the lexis's more????? I duno i'm just hypothesising.
 

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"Clean" the best mod.
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Im only commenting on the fact you didnt spell out "spark" or "change" in your title:cool:
 

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'06 Tacoma PreRunner
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I changed my plugs @ 30k and yes Toyota uses two different plugs, Denso and NGK. When I went to the dealer though, he gave me six Denso plugs saying that was the part listed in the system.
 

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'08 tacoma pre-runner
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i got the 4 banger and i had 2 different plugs also haha the first thing i did after getting my truck in my garage from the dealership was change those suckers out!
 

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i got the 4 banger and i had 2 different plugs also haha the first thing i did after getting my truck in my garage from the dealership was change those suckers out!
Why? What possible benefit to replacing completely good iridium plugs?
 

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'08 tacoma pre-runner
tacoma
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520 Posts
.

Why? What possible benefit to replacing completely good iridium plugs?
tell you the truth idk its just a habit, iv had 3 cars in the past 4 years and every car i have done that too...
 

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06 Taco 4x4 TRD
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My plugs looked pretty good at 30K. Certainly not the worst plugs I've pulled out of an engine. But I don't know how much longer they'll go.

I've had my oil tested at a 5K interval and it was holding up well too. But I still change it every 5. It's not preventative maintenance if you do it after it breaks.
 

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Discussion Starter #19
Why would the mfg install better spark plugs in the 4 cylinder...?
 

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Why would the mfg install better spark plugs in the 4 cylinder...?
Thought it had to do with different internal temps...but I'm probably wrong.

FYI on the 2 plug types. When my dad switched to working on toyotas in the early 90's, that was the first thing he noticed about the V6's...that toyota put in 3 of one type on one side and 3 of the other type on the opposite side. He was told by toyota in training that it was to maintain an equal support for its 2 plug suppliers. New to me though that they're now doing it in the 4 cylinders too. I'll have to pass that on to him since he's been retired for many years now.

As for how far the standard 30K plugs will go...well that depends on who you talk to. There's been other threads in here about that topic. I changed mine at 48K miles and they could have gone to 60K easily. I've seen others' pics on here though where they're worn down/burnt really bad at 30K miles. So it just depends on your truck and how you drive it (or possibly the gas or environment)?...rhetorical question.
 
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