After spending a number of hours trying to figure this question out and a couple trips to the Dealer to spend some time with the Service manager and his computer I don't believe engine run time is recorded.
I can't imagine why Toyota decided to make this data inaccessible even to their own techs. Seems like this could be important data to have in some cases.I've searched for this info in Techstream. It's not there.
The software in this car isn’t purpose built PHEV software. The Prime is a plussed-up HV. No need to monitor engine time on an HV. So im guessing they took the HV software and did the bare minimum to make it work. You can see this with the meaningless combined MPG, the energy screens in the infotainment (HV battery doesn’t show level), charts that cap at 60 MPG.. Cruise control that doesn’t know it’s an EV and runs the engine, etc. Engine time just didn’t make the cut. In software engineering, we call this a “minimum viable product.” (MVP). That’s what we got here..I can't imagine why Toyota decided to make this data inaccessible even to their own techs. Seems like this could be important data to have in some cases.
I went through the same exercise in Techstream last weekend, and you can tell that the parameters are built around a HV, not a PHEV.I've searched for this info in Techstream. It's not there.
Yeah, I would love to be able to track combustion miles for a real oil change interval. I end up changing the oil once a year, and the engine probably only has about 200 miles since the last one.My previous experience with Ford PHEV makes me jealous, as those vehicles track combustion and EV miles separate, and use that info to properly calculate oil life.
I just take the total gasoline pumped X 38mpg for a rough estimate of ICE miles driven.Yeah, I would love to be able to track combustion miles for a real oil change interval. I end up changing the oil once a year, and the engine probably only has about 200 miles since the last one.
I topped off the tank in September of last year. I have about 7/8 of a tank left. That's maybe 50 miles?I just take the total gasoline pumped X 38mpg for a rough estimate of ICE miles driven.
After 11,238 total miles to date my usage is 57% ICE miles and 43% EV miles on my 2022 XSE.
Keep in mind the oil change requirement is 10K miles OR one year, which ever comes first. I change the oil in my 4Runner once a year even though I only do 3K miles a year.I will be doing oil changes every 10K, as I used Mobil 1 full synthetic, and drive primary EV miles.
That's what I do. The result should be very close. I am at right around 60% EV miles vs 40% HV.I write down gallons of gas filled. I have always kept a vehicle "diary" before anyhow. Very useful when trying to decide if those windshield wipers are getting old or its just my imagination. Etc Etc. If you know how much gas you pumped, you can extrapolate to the HV miles, based on a rough estimate of your HV mileage. Of course, even in HV mode, the engine is not always running. Having been around three Prii, we owners never debated this before. We knew that it was not always running, but its starting and stopping constantly. That has to have its own set of issues........
But I'm more interested in miles. I don't think there's a solution for that.See post 4. It works well for me.
Climbitnow's suggestion above is what I use as well. I track fuel consumed, assume 38 MPG, and that gives an estimate of HV miles driven. It's directional, but I've tested the method on a road trip where I drove 100% in HV mode, and HV miles driven via this estimate was quite close to actual miles recorded on the odometer (i.e., the 38 MPG estimate was about right for what the car actually achieved). It'll be rolling into its first oil change in a few months here with probably about 2500 miles of actual engine use.But I'm more interested in miles. I don't think there's a solution for that.