Spark plug replacement

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May 16, 2020 | 01:11 PM

#31

Sasnuke

Lexus Test Driver

Joined: Feb 2017

Posts: 6,260

Likes: 1,752

From: Richmond Hill, Ontario, Canada

Quote:

Originally Posted by Drcoffee

I’m just about to purchase a IS350 2014 and was scanning the owners manual for maintenance items needed at 60,000 miles. I noticed the spark plugs get changed every 60k miles. I thought iridiums last 120,000. Why do these cars need new $80 plug changes so quickly?

It's hard to use one standard for all iridium plugs as it really depends on the engine they are installed in and the vehicle usage.
Rather than guess they last 120K Miles...check the different manufacturers of spark plugs (NGK, Denso, etc.)...60K Miles is not that uncommon.

May 16, 2020 | 01:28 PM

#32

Flash5

Pole Position

Joined: Apr 2018

Posts: 2,626

Likes: 459

From: GA

Quote:

Originally Posted by Drcoffee

Lol the 4 banger turbo requires spark plugs like every 30k miles. In that case it’s all the added pressure from the boost. For the 350 I’m not sure why it’s 60k probably the way it’s tuned from the factory?