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I tried to get a jump on improving the milage on my 04 Frontier extgended cab by adding a gadget called Mileage Monster Hydrogen system. Cost a little under $700 installed. The net effect after 1395 miles appears to be pretty much negative. My recommendation is that you not waste your money.
I also have a Scan Guage II. Its readings seem to change more rapidly than I can compensate. Does anyone have any ideas for smoothing that might eliminate the rapid changes? I also would like to hear any ideas for improving the bricklike design that I have to deal with.
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