I was wondering how many miles on the TC's till you have to change your OEM spark plugs. Ive done 43k so far. I know with my 3000gt and my Mirage it made a huge difference after only about 20k of driving. I dont know if the TC's are different. Plz let me know, im going to advanced in a minute to get a thermostat and some oil and might get plugs if its needed. THANKS

 

meh if you wanna spend the extra cash then go ahead, they probably won't be that bad. if it me i would wait till 50k. i think the manual recommends something like 70k (just guessing).

 

The manual recommends over 100K (120k I think.. but double check that). I would feel comfortable going 80k or more on them, especially if it running well. Iridiums are made to last a very long time.

 

Thanks guys, I decided against it. No need to spend the money if it ain't broke and its not a necessity to me. :D

 

it should be good.. if aint broke, dont fix it

 

yes, 100k but IMO change it @ 80k.

 

so your the type of people that will w8 until your car is smoking? then you try to get it fixed?

lol anyways isnt the oem sparks iridium? that stuff can go over 100k miles but i guess 80k is fine.

 

why not pull them out, check the condition and gap, and then decide whether or not to change them?

 

i didnt say not do maintenance.. the guy has 43k on a stock tc.. its like not changing your pistons when you dont have too..

yes stock are denso iridiums

 

i change mine every 10k but i'm on nitrous

 

really depends on the use, for modded cars thats where it varies.. i change mine after 8k on my turbo setup but thats coz of using different tunes

 

I just replaced mine at 36,000 miles and the old ones looked pretty worn out, tips were white. By the way my engine was stock at the time, so no aftermarket to blame for the spark plugs looking that way.

 

Well thanks guys. Ill probably change mine at 50k just for the crap of it. LOL. Because 50 sounds important. Any suggestions what I should get when I do purchase.

 

get denso iridiums, there's one at ptuning.com, a bit costy but you can get a good iridium IX at dezod.com or sparkplug.com

 

friend of mine got the stock denso iridium from the dealer to install them. When we pulled out the factory plugs, found out they were NGK IFR6T11 plugs! Did some calling, the local auto parts store has the IFR6T11, it's called "NGK OE Laser Iridium". $8 a plug.

Why did he not use the denso? We did install them! Well ..the car's idle wasn't as quiet, power was rough, took more cranks to start the car. Put a new set of NGK in and instant smooth idle, quiet, etc. The denso were checked for gap and noticed that the side electrode wasn't lined up perfectly with the center electrode! Not a good mark for their "quality". I figure that one of them was probably misfiring, but it was better just to go back to NGK. I've always had good luck with NGK, so when the time comes for mine, NGK is going in after I saw what happened with my friend's tC!

You can tell what my answer for you will be. NGK IFR6T11 part no 4589.

 

I have had bad NGK's just like any other. Bad parts can happen. NGK's are good, Denso is typically probably a bit better, but either is a great choice.