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Best spark plug today????
What is the best plug being installed today?
I have Bosch +4's, still get 21-22 mpg combined city/hwy. This in a 92 @124K+ miles, 20 years old in October. Are the iridium plugs the top choice? TIA
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LS-L 92 black top silver bullet-Turned into a 2005 Jeep TJ Unlimited 2012 Outback 3.6R Limited! |
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