Here's a cool item I recently came accross on the net:



(Click on the picture to visit the Manufacturer's website.)

Here's what it does:

1. SCAN TOOL

Troubleshoot your own car and turn off the
"Check Engine", "Service Engine Soon", or other
warning lamp and clear the trouble warnings.

* Reads Trouble Codes
* Reads conditions that set the Trouble Code
* Clears Trouble Codes
* Turns off "Check Engine" light
* Make and store up to 10 rewritable special codes to send to the vehicle computer

2. DIGITAL GAUGES

Shows 4 gauges at a time from the possible following:

* Fuel Economy
* Fuel Rate
* Battery Voltage
* Coolant Temperature
* Intake Air Temperature
* Engine Speed (RPM)
* Vehicle speed (MPH)
* Manifold Pressure (not available on some vehicles)
* Engine Load
* Throttle Position
* Ignition Timing
* Open/Closed Loop

3. TRIP COMPUTER

Automatically tracks three sets of trip data -
Current (short) Trip
Days (total) Trips
Previous Days Trips

* Maximum Speed
* Average Speed
* Maximum Coolant Temperature
* Maximum RPM
* Driving Time
* Driving Distance
* Fuel Used
* Trip Fuel Economy

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For $130, this seems like a useful tool. I did a bit of googling and found out that the guys at the RV.Net forums really like the device. There are many threads about it here

I'm going to order one and let you guys know how it works after I receive it.

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EDIT: If you call 1-888-433-5664 and ask for Ron, he will sell it to you for $122 shipped. Oooo-hooo an 8 dollar discount!