The Best Spark Plug
- Thread starter MaliciousClout
- Start date
Whitebeauty
New member
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1) Spark plugs could be the reason though. The recommended replacement interval for V6 is around 25-30K miles. However, when I bought my 2006 t4r used with 78K it had the original spark plugs in it (3 denso on one bank and 3 ngk on another - it's the way they install it on plant). The engine was running just fine, although improved and became smoother when I replaced them with stock regular Denso.
2) It then improved even further when I replaced regular Denso with iridium ones after 15K. I TESTIFY THERE IS A HUGE DIFFERENCE! I can't compare the mileage - it's cold in here and I warm up the engine a lot. Traffic jams also add to low mpg. But I can judge even smoother running, easier start. I feel I get slightly more power. Well, the engine even sounds better.
If you need more technical info on why there's a difference, just google it. Iridium spark plugs have a very tiny tip, much more stable and stronger spark because it is centered and ignited in the same place as opposed to much thicker copper tip in regular plugs. It gives same strength of spark every time thus helping to ignite and burn fuel mix more effectively. Also, the fact that you can change them at 100K interval actually means that they are better in quality anyway. I thought it's a pure marketing and was skeptical until tried myself. Besides, price for iridium ones is not much higher.
P.S. I just posted this and then saw Whitebeauty's post with photo above - these are the ones I have installed, they're great! Although, mine were pack in Toyota red boxes.
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What is it with "What Oil?" and "What Spark Plug?" threads that get everyone into such a tizzy.
Says right on the motor to use "iridium plugs only" for the V8. Like everyone else has said, NGK or Denso are going to be your best bet.
I use Valvoline Dino oil in mine, changed every 3k if anyone wants to blast me for that :guitar3:
Says right on the motor to use "iridium plugs only" for the V8. Like everyone else has said, NGK or Denso are going to be your best bet.
I use Valvoline Dino oil in mine, changed every 3k if anyone wants to blast me for that :guitar3:
If long life spark plugs such as iridium are going to seize, then I rather have regular plugs that I change every two years or so. The added bonus is being to check the condition of the plugs/engine regularly.
BlackWorksInc
New member
Part of the reason for the plugs siezing is because of design (*Cough* Ford V8, V10 Triton Engines I'm looking at you! *Cough*), and because from the factory they don't usually put any type of anti-sieze compound on them. Even with all our Toyotas, I have never seen a spark plug with anti-sieze on it from the factory. Now is putting anti-sieze on the threads bad? I can't say, but I can say I haven't had an issue with it yet and it helps prevent them getting to stuck in the head.
Mike has a good suggestion, maybe every 60k or so you check the plugs, don't have to replace them but crack them off and take a look so they don't weld in there.
Mike has a good suggestion, maybe every 60k or so you check the plugs, don't have to replace them but crack them off and take a look so they don't weld in there.
My tower is bigger than yours.:jump:
No problems for me. I have been using anti seize for years and never an issue.
JB.
New member
Sounds like it puts the dealer in kind of a tough spot when changing long life plugs. I guess if it's within the maintenance schedule any damage is on the dealer. Have you seen it happen?
emelianenkov
New member
Thanks for the info Banzaj!
I went to Autozone last night and picked up some Autolite iridium spark plugs and anti-seize. Because I have a K&N cold air intake, the left side plugs are totally in the open. The right side however.... God that was a PITA!
I checked out the stock plugs when I got them out and I'm seriously amazed that they were even producing a spark! They were so burnt, rusty and corroded.
Got the new plugs in and my truck started like a freakin champ! No more startup issues
-Alex
crackiswack
New member
Why did you go autolite? Did they not have NGK or Densos?Thanks for the info Banzaj!
I went to Autozone last night and picked up some Autolite iridium spark plugs and anti-seize. Because I have a K&N cold air intake, the left side plugs are totally in the open. The right side however.... God that was a PITA!
(Look at the left side vs. the right side).
I checked out the stock plugs when I got them out and I'm seriously amazed that they were even producing a spark! They were so burnt, rusty and corroded.
Got the new plugs in and my truck started like a freakin champ! No more startup issues
-Alex
Whitebeauty
New member
emelianenkov
New member
They had neither the NGK or Densos at Autozone. I had also checked at NAPA auto and they didn't have any either. I really needed to change the stock plugs. They seem ok so far, so I'm not too worried. Worst case, I can throw these out if I don't like them in a few thousand miles or so.
emelianenkov
New member
That sounds incredibly vague yet scary. Mr. Cowhampshire, what problems shall I expect?
(I have a cottage up in Ossipee, NH. I'm not hating on the state)
crackiswack
New member
Did you try the dealership? They have the densos for under $3/pop
Autolite plugs were in my 95 when I bought it. After I switched to NGK the truck ran much better and had more power. They have a bad rep for a reason. The only motor that I would put Autolites in is my lawnmower!
emelianenkov
New member
Crap..... Well, I'll see how these fare for me and make a call next oil change.
Anyone try those E3 spark plugs? Spike TV makes them seem amazing lol
bergs
New member
I must have gotten lucky then when I put Autolites in my Ranger then towed with it for the last 80,000 miles. No issues and fuel mileage stayed constant........"crappy", just in case anyone was wondering.
The 102,000-miles plugs that were in it prior to that? You guess it, Autolites.
:wow2:
emelianenkov- I have used the single electrode plugs in everything I ridden, driven, raced and crashed and never once had a spark plug-related issue. Everything else seems gimmicky and not worth the $$, IMO.
The 102,000-miles plugs that were in it prior to that? You guess it, Autolites.
:wow2:
emelianenkov- I have used the single electrode plugs in everything I ridden, driven, raced and crashed and never once had a spark plug-related issue. Everything else seems gimmicky and not worth the $$, IMO.
emelianenkov
New member
I must have gotten lucky then when I put Autolites in my Ranger then towed with it for the last 80,000 miles. No issues and fuel mileage stayed constant........"crappy", just in case anyone was wondering.
The 102,000-miles plugs that were in it prior to that? You guess it, Autolites.
:wow2:
emelianenkov- I have used the single electrode plugs in everything I ridden, driven, raced and crashed and never once had a spark plug-related issue. Everything else seems gimmicky and not worth the $$, IMO.
I'm with you. As many a logical man has said before; a spark plug is a spark plug is a spark is a spark plug is a spark plug.....
