Ok here is what I know so far. I love cool techi things so I went online and found a v-gate obd2 adapter
and purchased it. ( like 21 bucks ) I also downloaded a app called torque pro. they have a free version
but I bought the full version for like 5 bucks. (droid phone) So I plugged the adapter into my 13 rocket touring's obd2 port and setup the Bluetooth on my phone and bam i got readings. I need more time with it but I found a tachometer, coolant temp, speedometer, gps speedometer, fuel flow, throttle percentage, mpg
instant and mpg average all work. kinda cool. There is a second or so lag most noted on the tach but
not a big problem unless you plan on going to the drag strip. lol. I am still learning and may post some videos if anyone is interested.