Well i've read that you should change your spark plugs every 2-6 months to get the most performance out of your car. Now my question is (if this statement is true) I run nothing but 94 octane obviously a cleaner burning gas, am I also suppose to change this often, or does this pertain more to areas that only have 91 octane?

TIA
Adam

 

actually depends on boost application's how much boost are you running ? the more boost the faster you need to change since your spark plug is firing more. the more abuse the faster as well correct me if im wrong tho

 

I wouldn't go by the mileage, because it can vary completely based on how much you drive. I changed mine at like 20K, it was definitly time for a change. Got NGK BPR7EIX Iridiums in there now and it runs great. I got the car tuned as well, which helped out with the blacking-out of my plugs.

 

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