I have a Fiesta and an UltraGauge. I have long-term MPG, short-term MPG, gph, and engine temp (because the Fiesta does not display this), engine load %, and gallons remaining in the tank. So I guess that is 6 things.
MPG, CHT, SOC, and LFT. I'm watching my LFT while in transition to E0 gasoline. Once that stabilizes, I think I will switch it to current trip average MPG.
instant ...... trip average hp .......... mph the lower row is often changed to whatever else like rpm or engine temp, gph
LOD........DailyMPG S.Trim......AFR plus my car's factory instant MPG gauge. I sometimes switch to coolant temprature in winter time vs. Short term fuel trim. my fuel trims are always 0 but sometimes they really go negative in winter which means my car is running too rich, so i keep off the throttle to save gas, even though my AFR is reporting stoich (wrong because o2 sensor is still cold). I also use horsepower because my engine is most efficient when making 35 horsepower and the scangauge horsepower figure is very accurate in closed loop.
Currently: Battery current | Engine speed Fuel flow rate | Coolant temperature (Instantaneous MPG is trivial to compute from flow rate and speed) It's annoying to be forced to use up two of the four spaces for basic variables that are standard on normal cars. I switch to (12-V) battery voltage occasionally, and may add (traction) battery temperature in the summer.
With the Prius , I now only use Scangauge for RPM and more importantly , coolant temperature. I do compare the SG Trip info to Toyota's when I fill. The SG still under-reports by 1-2% , but that's still a lot closer than Toyota fcd.
