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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
i'm curious about spark plug replacement - and how often it should be done for older vehicles. Specifically my Explorer is 22 with almost all original parts. I'm only the 2nd owner and it's been in good care since 2006.
in general spark plug replace is at 20K. i'm only at 17k and i've got a...
