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Discussion Starter #1
I will be buying a 1st Gen IS300 in the next month or two and Ive been trying to research the best NGK plugs to get but I want to get some opinions. What is going to be best for fuel economy, performance, or both?

Ive been looking at :

NGK Iridium IX

NGK Laser Platinum

NGK Laser Iridium

Im mainly concerned at this point with getting the best mpg out of the car. Any suggestions?
 

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i just installed the iridium ix, i dont really notice a difference, i think the stock ones are iridium as well, if im not mistaken
 

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I think most IS300's have Iridium plugs... mine did. However I believe some came with platinum plugs.

I have Iridium IX's in my car as well... I don't think I had access to the Platinum ones at the time tho.
 

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Sounds good, those Iridium IX were the ones I was looking at. Since I will be buying a used one I figured I want to get those changed asap.

Anyone get any aftermarket plug wire sets? I was also looking at the NGK wire sets. Again, not looking for a boost in performance over stock from these things, just want it running at peak performance...
 

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changed my spark plugs to NGK IX Iridium about 2 weeks ago, didn't notice anything different...Mine had Denso Iridium before...both iridium..But maybe you will notice something if you have platinum changing to iridium.
 

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ive noticed a difference in my IS when i bought the NGK iridium IX for my car . From my Denso which im now starting to believe where platinum instead of iridium. I didnt get around to checking the number on the Denso plug i pulled. NGK IX feels smoother and not as punchy on the downshift feels like a slower on the acceleration than my old Denso plugs. I bought plug wires from the lexus dealer as well, not sure if i have to drive the car more for the plug wires to get used to the ignition signal or what. but doesnt really feel as strong as Denso :suspiciou
 

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NGK BKR6E-11 here.
 

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Sounds good, those Iridium IX were the ones I was looking at. Since I will be buying a used one I figured I want to get those changed asap.

Anyone get any aftermarket plug wire sets? I was also looking at the NGK wire sets. Again, not looking for a boost in performance over stock from these things, just want it running at peak performance...
I got the ngk wire set but don't really noticed a differences and going stock for plugs can't go wrong; ngk iridium laser.
 
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