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Old 09 Mar 2012, 09:42 am
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Default Spark Plugs

I have a couple of questions about plugs. I went to order some new plugs and they said they needed the VIN number? After I got the plugs which are NGK LZTR4AIX-11. I went on NGK website and they say I should use a 5 with a wider gap. When I called the store they said that the 4 is a hotter plug. Question is what makes a plug hotter or colder and what is the difference? Also if I use the 4 instead of the 5 will it hurt anything, How about gas milage etc. Thanks in advance.
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Old 09 Mar 2012, 10:38 am
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Default Re: Spark Plugs

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Originally Posted by PT_Panel View Post
I have a couple of questions about plugs. I went to order some new plugs and they said they needed the VIN number? After I got the plugs which are NGK LZTR4AIX-11. I went on NGK website and they say I should use a 5 with a wider gap. When I called the store they said that the 4 is a hotter plug. Question is what makes a plug hotter or colder and what is the difference? Also if I use the 4 instead of the 5 will it hurt anything, How about gas milage etc. Thanks in advance.
A 5 with a wider gap would make it fire hotter but the gap widens out purity quick on these cars anyway Rather have the hotter plug. Burns fuel mixture better. Should give the better of the mileage the car will allow.
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Old 09 Mar 2012, 12:28 pm
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Default Re: Spark Plugs

Those NGK LZTR4AIX-11 plugs are for the non turbo.So the part guy made a mistake. You should change them for the NGK LZTR5AIX-13 gapped at .040. ( btw, that's what I have in my car with no issues )
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