I successfully added short term fuel trim, long term fuel trim, and lambda from the O2 sensor to the Scangauge.
I also added the second O2 sensor (after the cat), horsepower, torque, and air fuel ratio, but I didn't get to test them to see if they work.
Long term fuel trim is 12, whatever that means. Short term fuel trim was 0 or 1.
Could it be that 12 means 12%, and the injectors are 12% over their normal duty? Makes sense to me. That would be about right for 30% ethanol.