Should I replace my plugs? - Power Hungry Performance Forum

		Power Hungry Performance Forum > Ford F-150, Expedition, Navigator, Blackwood, Mark-LT, SVT Lightning and H-D Editions (Disabled) > 2004 to 2008 F-150 and Mark-LT
Should I replace my plugs?

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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.

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Sat, April 2nd, 2011, 10:59 PM

ticopowell ticopowell is offline

Grown-up in training!

Join Date: Oct 2009

Location: Currently in Locust Grove Ga

Posts: 864

ticopowell will become famous soon enough

I decided to wait until at least summer to change them, I put seafoam in the gas tank and I started getting a few mpg's more than before at start, and then part of my trip from utah I got 17.7 hand calculated mpg's!!!! I know a large part of that, probably 1-2mpg's, was from the wind, but still I am pretty happy about it!

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