I have one, but they're only $170. Love it. The amount of data it can tell you is pretty amazing. It is all alphanumeric though, no graphic gauges.
For most of the data it collects, you can gather it as:
instantaneous
this trip
today
yesterday
this tank
This includes (but is not limited to):
MPG
gallons used
$$ cost
miles
time
avg and top speed
max rpms
engine temps
and more.
If you have an engineer's desire to measure, profile, compare, and optimize, this is one fun auto gadget. Also useful for hypermile-ing.
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