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1 month agoI own a Prius (not a PHEV though, just a hybrid) and can corroborate that my mileage goes down significantly in the winter months. It is a combination of a couple factors in my experience.
- Needing to run the engine more to heat things up for defrosting and heating the cabin.
- Related to the above, I tend to idle a lot more in the winter while cleaning ice/snow off the car, letting it warm up, or clearing the driveway.
- Switching to winter tires (Blizzaks) negatively impacts rolling resistance compared to the LRR tires (Ecopias) I use the rest of the year.
I tend to average ~45 mpg in the summer and ~37 mpg in the winter over the past two years.
This is still a little weird. I found that the web client (in a browser) handles this really well with default settings. However, if I try to use the desktop app or a mobile client, I have to force it to burn in the subtitles for them to show up reliably. Fortunately, there are per-client settings for this now: