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after attaining an average of 10-12mpg both city and highway, I decided enough was enough. considering that my current job requires me to drive just about 100 miles one way to work, something had to be done about the fuel mileage in the truck. the 4.10 gears arent helping matters, but I'm not going to swap them out (just yet).
first things first, changed the spark plugs
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highway/city combined fuel economy went from 10.3 mpg to 11.8 mpg
Spark Plug pics. starting with #1 cyl and going thru #8
as you can see, some of them are corroded/worn down to a nub, and the others had plenty of arcing and buildup/contamination on them.
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