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Jan 9, 2014 | 09:10 AM

dgm

Thread Starter

Joined: Dec 2013

Posts: 73

From: Florida

spark plugs

Any advantages of autolite iridium over the one step colder copper 606?

Jan 9, 2014 | 09:15 AM

ChibiBlackSheep

Monte Of The Month -- August 2014

Joined: Sep 2008

Posts: 25,145

From: Southeast PA

If you don't need colder plugs, no need to spend the time on them.

Iridium should last longer than copper. Copper helps keep the KR down, but needs to be replaced almost yearly.

Jan 9, 2014 | 11:47 AM

The_Maniac

Monte Of The Month -- December 2011
Monte Of The Month -- September 2014

iTrader: (2)

Joined: Apr 2010

Posts: 12,605

From: Mentor, Ohio

My old '94 Grand Am (3100 powered) ran copper plugs, they would last about 50K miles.

But I agree with Chibi, no need to get copper. Stick with platinum or irridium. I've been using NGK platinum plugs lately and they work GREAT!