Fuel efficiency chip:1998 1500 5.7L
#2
CF Junior Member
A guy i work with used one on his 97 with a 4.3 v6 and got 0.5-1.0 mpg better. Depending on how much driving you do, it may pay for itself. Ive always been leery of using them because im scared it'll damage the engine. What mpgs are you getting? I average around 14 in my 5.7.
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