BM3, MHD, and MGF you can see it via the tach with steering wheel controls. Ecutek, your tuner can hijack the torque/hp gauges on the center screen to display ethanol percentage.
Reality is that you shouldn't have to check it very often so any of the above are a good solution.
That's not how it works. What you visually see on the dash is different than what the BDC uses for mileage. There is a raw speed and then it does the math to add the speed buffer and then report that on the speedo.
If what you said was correct there would be like 10,000 lawsuits.
What WOULD...
Yea that is a nice perk in the UK for sure. Here in the United States, again, there is a 60k/5yr powertrain warranty to which the DME is a part of. Concept is wrong as usual.
Pressures will def be setup,track, ambient temp, and even tire dependent. I run about -3.9/4.0 front camber. My main local track is 98% right turns and I run RE71RS's as my main tire.
It would be fine. They have presets for both. It's not like they would be running it with mapping that was for OEM fueling. I've run HPFP and S58 injectors on the stock tune with the presets selected.