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Discussion Starter · #1 · (Edited)
Hi,

I am looking to replace my IFR7X7G spark plugs in my 2013 Cruze (1.4L) with the same OEM part. I am close to 60000 miles.

ACDELCO 41-121 or NGK 91039 (IFR7X7G) or 95609 (IFR6Z7G) seem the be the OEM choices.

Starting with 2014 models, NGK
95609 (IFR6Z7G) seem to have been replaced by NGK 91039 (IFR7X7G), the only difference being the HEAT RANGE and Resistance according to ngk.com.
I also see the maintenance intervals on spark plugs were reduced to 60000 miles starting with 2014.

The IFR7X7G are hard to find and expensive so I am thinking to go with the IFR6Z7G. Is my logic here correct? Were there any changes made to the 2014+ engines to use this new IFR6 spark plug instead of IFR7?

Thank you,
Cristian
 

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Administrator, Resident Tater Salad
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2014 used a different factory tune that was probably tweaked to run on the plugs supplied with it. I would stick with the 7 heat range for your year.

60k interval is probably appropriate. You may have to resort to Amazon or something to find the IFR7
 

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I have a 2013 2LT and just changed my plugs using the AC Delcos 41-121. They have the appropriate iridium tip and I talked to AC Delco directly and they advised not to attempt to re-gap them as the electrode is finely coated and only about .5 mms wide. They are shipped with a protective sleeve to insure factory gap. Best of luck!
 

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I would still check the gap. We've seen too many plugs not gapped to the plug manufacturer's spec to trust the out of box gap.
 
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