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Old 08-03-2013, 03:16 PM   #21 (permalink)
hat_man
Master EcoModder
 
Join Date: May 2010
Location: Illinois
Posts: 475

Oh Deer - '03 Ford Ranger XL
90 day: 33.97 mpg (US)
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So what is the current (no pun intended) state of this discussion? Colder plugs might be better for FE but harmful to the engine? I am interested in this but still a little confused.

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