I have both and older Scan Gauge and an older Ultra Gauge. Personally I like my Ultra Gauge better because the screen gives me 6 gauges instead of 4 like my Scan Gauge. There are several good things about them other than just fuel economy uses. You can scan the ECU for codes and set up gauges such as ECT, Volts and RPM so you can keep an eye on parameters that possibly don't have factory gauges. I think the price of an Ultra Gauge now is about $80 vs about $170 for the Scan Gauge.
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