Thanks, folks!
For now, I think I will use my manually-calculated MPG. My reasoning:
1. I live in Florida, so I believe my math will be less affected by the well-known "shrinking bladder" effect that the Prius has in cold weather.
2. All I have to do is forget to reset my trip computer one time, and "bonk"...there goes my accuracy. But I always write my ODO down in my book whenever I fill up. Strange how I can remember to write my info, but forget to press a button!
3. I will note my MFD (yes, "computer screen") value whenever available, but won't use that in the database.
4. If I decide to change my mind in the future, I'll make a note of it.
Thanks again, for all your great input!
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