Pulled the plugs from a 2006 350z today, BONE STOCK with 44K miles on it before getting an Osiris tune, had a big shock when we looked at the plugs! He ended up putting down 258whp with only a K&N filter, said it felt like he was in a whole new car!

Nissan says 100K miles between spark plugs but I've never seen one last that long... Rich at Uprev said he "always quotes customers 15-25k miles between plug changes depending on how they drive and if they are FI. A simple change of the spark plugs to factory fresh NGK plugs is good for 3whp on an NA car."

WOW. All I can say is if you haven't gotten tuned you should :icon9:

 

Sound advice...

Also considering the experience I just had. Bought the car used and it had the wrong plugs with the wrong gap the whole time I've been driving it since... about 20k in a year and a half.

 

Wow, that's some build up for 44k!

So is AutoZone @ $9.99 ea about the best deal in the area for the NGK Laser Plat.? If anybody knows or has a better deal please let me know, Thanks!

Thanks for the Reminder Joe, I was all set to do the plugs a while back and I guess it slipped my mind with all the house stuff I have been doing.

Jason

 

For NA the greddy L7's are the best ones that we've found, not cheap but worth it. Other than that donno

 

Damn I need to do mine also. 80K+

Who has the cheapest? Some online place right?

 

^+1 on the sparkplugs.

defintely felt the difference

 

i believe a vendor was selling some on here for about 6 bucks for ngk plats... i'm at 118k.... i'm probably going to order some for next weekend

 

I should replace mine as well. I've been getting 10mpg for the longest time.

 

^10mpg

 

tell me about it. Been getting <200 miles a tank.

 

Oh lord...then you wouldn't want to hear about my 400mpT avg...get em changed out man!

 

I think i'm gonna change mine this weekend. I just bought the car and know the last time they were changed was 30k miles ago. I was wanting to clean up the engine anyways.

 

oh damn. I need to do this asap!

 

If you're getting only 10mpg there is something seriously wrong... you should get some maintenience done asap :/

 

The only things left to do that could possibly improve my MPG is differential fluid and the spark plugs. Hopefully its one of this issues. Or maybe I have leaky valve covers. Guess I'll find out when I check the plugs. It just never ends with this car..