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Registered
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148 Posts
Discussion Starter #1
Hi

Since a week, I am running my 1998 Altima on the colder spark plugs BKR6e-11 and it noticeably gained power over the stock BKR5E-11.

However I also noticed gas mileage has dropped by about 20%, how is that possible?

thanks
 

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Breu Meister
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6,646 Posts
it's a farse...you need a tune-up buddy. don't switch to colder plugs unless you are pushing well over stock HP.
 

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Import Tech.
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4,670 Posts
Actually , switching one # cooler is a good upgrade even on a stock engine, the 6 range will help prevent pinging, if you are a spirited driver the 6 range is a must .... Yea, 7's are only for the build engines or turbo ...
 
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