Odometer and actual ICE mileage.

While I can't think of any reason to know this, it is just math. If you know the total odometer and the % of Hybrid travel Odometer * HV travel /100 = HV Mileage

 

Why do you need to know the ICE mileage?

 

does the liftback have a lifetime hv/ev %? i don't think the ice is only on 50% of the time, but i'm guessing as well. going forward, perhaps a scangauge will help, but i don't know if it records something like an hour meter.

 

Check Techstream for engine hours.

 

Well with any ICE vehicle you never know how many hours the engine has run. Just the number of miles. Lots of delivery trucks never turn off the engine while stopped.

With the Prius there are times when the ICE is spinning with-out any gas being injected. How do you count this time?

I agree it would be nice to know the total run hours of the ICE.

 

Yes the ICE spins without using gas. No gas, no injection and no ignition, all computer controlled and are easily tracked. If the engine is spinning without ignition, then it is not running, just turning. Very low load, but still lubricated metal against metal.

So why is it OP wants data on engine running? Keep track of gas used and you might be able to convert that to engine hours. But I would check Techstream and see if there was an engine hour timer.

 

Odometers measure miles traveled on all cars! You might like an engine hours meter but even that doesn't really tell you much because its how hard the engine works, under what conditions that is important. If a conventional car sits idling in 100 degree heat and coolant at maximum temperature for an hour (no miles) is that the same as 4o mph on a cool day and coolant at 190 degrees for an hour?

The ICE does't have to work for all those odometer miles. It doesn't have to work when you are stopped (ICE off) and perhaps the ICE is off some modest percent of the time at speeds below 40 mph. Just enjoy the fact the ICE (and brakes) will last a really long time!

 

And, adding a little "...flysh!t...to the pepper..." there is likewise the question of engine speeds (RPMs) the engine was turning when its engine-hours are being recorded, ie: stopped; at idle; at low-speed low-load; at high-speed low-load; or at high-speed high-load? It's definitely NOT a simple linear relationship like other vehicles follow.

 

It seems that sensor readings and calculations like those used in oil life monitors would make a lot of sense with the Prius. I suspect that Toyota conservatively calculated that the duty cycle of the Prius ICE was safely above 10K, so they just set the oil change interval at 10K.

 

Some GM have a hour meter you can check.