Here's a look at the plugs (NGK BKR5E-11) after 44,000kms.

1. Did they needed to be replaced?
2. There was no more NGK BKR5E-11 in stock, so I went with BKR6E-11 this time (better for cold starts as per http://forums.maxima.org/showthread....80#post2815980)

Also note that I was guilty of using cheap gas

http://www.premiereproduction.net/fi...ies/spark1.jpg
http://www.premiereproduction.net/fi...ies/spark2.jpg
http://www.premiereproduction.net/fi...ies/spark3.jpg

thanks

 

Look like normal wear to me.

 

Since you pulled them changed them. I would start using the better gas.

 

They look normal.

 

normal meaning they needed to be replace or I could of waiting a little more?

 

I'm not sure how long 44,000kms is in miles but, they look like they could last a bit longer in the car, but seeing as you have them out migh as well change them.

 

44,000 km is just over 27,300 miles or 91% of what they are supposed to be good for.

 

They probally could go longer but i would just change them out,

Are these the platniums or the coppers?

 

With that said then yes change them, your sparks are in a healthy condition, 30K is about the lifespan of the coppers.

 

Those plugs look like platinum. Are you sure you want to change to copper? Copper is fine, but you need to replace it more frequently than Platinum.

 

Those are plats and are rated to 60,000 miles.

 

So the coppers are rated for 30k?

 

Yes.

 

Those are not BKR5E-11's

 

Isn't the p/n printed on the ceramic portion?

 

The new ones I bought are NGK BKR6E-11 V-Power Copper..I didn't see any platium ones.

Dam..I could of left the platinum ones in there a little longer

 

is the electrode in the center supposed to be tapered like that? I've never pulled my plugs out (as you can tell).

 

Yes (for the plats at least).

 

Yea I have never seen it tapered like that...weird

 

Did you toss out the plugs you removed? Those plugs look to be in good shape to me.

 

Sure those aren't Platinum? Electrode looks a bit small (Pt = higher density than Cu)

 

I never said they were.. I don't know what they are, but when I get home tonight I'll check the label on it and report back.

Does anyone have a pic of what a bad spark plug looks like? This will help for next time

 

is your friend.

http://www.densoiridium.com/howtoreadusedplugs.php

 

Buy a haynes, or use for a spark plug reading chart ...

Actually you DID say they were

 

Oops your right...I made a mistake on the subject line...

Okay the plug I pulled out was a : PFR5G JAPAN NGK R is that platium?

Thanks NJMODI for the URL....I did google, but was looking for an actual pic. your site was even better! Pic and explanation.

 

You are welcome, and yes that is a platinum plug.

 

Another vote for a normal and light wear plug here.