Thread: Spark plugs
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Old 06-03-2008, 12:03 AM   #1 (permalink)
Jason
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Join Date: Apr 2008
Location: Buda, Texas (Austin)
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Ryan - '94 Mazda 323 BASEEEEE
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Spark plugs
If a car suggests say AP64 and you use AP63 ones would that be a heat range lower and get better MPG or worse?

Just curious...
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