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OEM Spark Plug issue

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Old Mar 4, 2019 | 09:14 PM
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jeffreylay581's Avatar
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Default OEM Spark Plug issue
So, after replacing spark plugs in my 2011 Mazda 3S milage seems to have gone down. I replaced them with OEM plugs
NGK 90083 LTR5BI-13 Laser Iridium NGK 90083 LTR5BI-13 Laser Iridium
. I replaced them at 90k miles. I seem to be getting roughly 3 mpg less. Since i changed them earlier than recommended i am considering putting the old ones back in. Any thoughts?
 
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Old Mar 4, 2019 | 09:24 PM
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Originally Posted by jeffreylay581
So, after replacing spark plugs in my 2011 Mazda 3S milage seems to have gone down. I replaced them with OEM plugs NGK 90083 LTR5BI-13 Laser Iridium. I replaced them at 90k miles. I seem to be getting roughly 3 mpg less. Since i changed them earlier than recommended i am considering putting the old ones back in. Any thoughts?
What plugs did you pull out of your engine?
 
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Old Mar 5, 2019 | 05:05 AM
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My thoughts too.
 
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Old Mar 6, 2019 | 09:13 PM
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Default OEM Spark Plug issue
Originally Posted by shipo
What plugs did you pull out of your engine?
ILTR5A-13G Also labeled with FoMoCo.
 
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Old Mar 6, 2019 | 09:28 PM
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Then here is the exact replacement plug:
Amazon Amazon
 
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