Am thinking about buying a scan guage D for my "01 Tradewinds LTC with the 3126B Cat 330hp turbo and am wondering what all it's gonna be able to tell me. Does the computer actually read all the things...
Bill/Trackrig Having had a ScanGauge II for 4 years, I've been very pleased with it. Your comment on the displayed MPG makes me think you either need to adjust your unit per setup instructions, or what you're seeing is MPG when downhill, or off-throttle. I have found mine to be quite accurate for both fuel used (comparing gallons required on fillup at the pump to the gauge's calculated gallons used), and for throttle-off/changes in uphill/downhill, especially the instantaneous MPG.