Yoshi on here makes them, and sells them. They are hand-made, and very high quality. You should see if Yoshi has any in stock - if so you could have one in your possession very soon!
He is going to be making an MPG one soon. I don't know if it will be configurable between km/l and MPG (because there is only so much room on the EPROM that the code goes onto).
Note that km/l gives you a much higher upper limit than MPGus or MPGuk - if you make the improvements that CO ZX2 has had you might be pleased to have the km/l one anyway. My SuperMID is not calibrated just now - and yet I have been doing very well (simply by trying to improve the number on each drive)
I took ages to slowly refine my driving technique - but now I have a SuperMID my current tank is doing very well (if you look at my gaslog, you will see my best tank - but it was a small fill so may have been a bit too optimistic). I currently am working on my best tank ever (slightly over half a tank, and 375 miles). Before SuperMID, I would have had 300 miles at this point, and, this is my first real tank with SuperMID being used for all the driving.
There is a SuperMID installation guide somewhere on here. Basically, you need to connect it to:
(1) Power - +12V and ground (so 2 wires here)
(2) Fuel Injector - 1 wire
(3) Speed Sensor - 1 wire
And I think that is it. The +12v / ground is easy, the fuel-injector can be found from a Technical manual for your car (or the owner's club forum). The Speed sensor, if present, can again be found via the forum... Or Yoshi makes a special in-line speed sensor which isn't that expensive, if your car doesn't have one.
Anyway, I can't sing the praises of the SuperMID highly enough - it has so many different things on the one display - km/l instant, km/l over the last 1km, km/l over this journey, km/l over the tank, engine on / engine off percentage, injector pulse width, timings, total litres used, total distance travelled, average speed, and some more things too!. I will be transferring it to my next car for sure!
Matt
P.S. I found Gassavers after many weeks of fruitless searching on google/yahoo/altavista etc for 'Fuel Economy Gauge' and other search strings
A thread about SuperMID eventually came up on Google.
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