Are Autolite better? I installed Bosch spark plugs. Now my MPG is definately down. :( | Page 2 | Ford Explorer Forums - Serious Explorations

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Are Autolite better? I installed Bosch spark plugs. Now my MPG is definately down. :(

Comparing 5.0L V8 engine performance from different plugs to the 4.0 V6 is not a good comparison.
 






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