I have both the ScanGauge II and Ultragauge and I know that at least one of them can measure Engine Time (E/T). It doesn't have to be a parameter in the OBDII, instead, these gauges just accumulate the total time if it detects the engine is running.

It's such a pity neither is supported on the non-standard OBDII 2015 Innova 2.5. Then again, the Innova G does have E/T included in the multi-information display. I just haven't thought of using it, until now. I wonder how high the readout (hours) can go.