I use the one from timeanddate.com, it seems to have better predictions than others for my area. Source: 12 months ago

Timeanddate.com has the sunrise/set data in an api. Source: 12 months ago

True, this, and all one has to do is look at solar noon altitudes from any place on earth on web sites like timeanddate.com. It helps when anybody local can verify these numbers (I used them to build a sundial so discrepancies would be noticed). Source: about 1 year ago

Sunrise/sunset times (like from timeanddate.com). Source: about 1 year ago

I always wondered if it's a satire of https://timeanddate.com - except that's probably not as well known as it deserves to be. Source: about 1 year ago

I'd also recommend experimentation with new methods per each tank of gas and use fuelly.com to track and add notes to see which methods work the best for your specific Prius and use case over time. Source: about 1 year ago

Sure there is. Go check out fuelly.com and tell me that you wouldn't be able to estimate pretty closely the mpg of any car you own based on that data and considering your own driving style. Source: about 1 year ago

As to the data the article is using... It mentioned fuelly.com as a source. Just clicking on a few PHEVs from that website, it's abundantly clear how tiny the data set is. Nor does it seem to do much in the way of data verification. I just pulled up the listing for the Chevy Volt. Somehow I doubt there are dozens of people between 200 mpge and 500 mpge (200 mpge = 6 mi/kWh), and even 2 cars are listed at 1 mpge! Source: about 1 year ago

Fuelly.com has real-life experience for each. Source: about 1 year ago

Nice! I have a 2015 corolla LE and my best tank was 50.8 MPG on 412 miles. It was a trip from KY to OH cruising around 65 mph mostly. I average 42.8 MPG across 140,264 miles tracked via fuelly.com. If I didnt live in cold Michigan winters it would be higher. Very fuel-efficent gas-only car, definitely capable of 50+ MPG with the right conditions and certain manner of driving. Source: over 1 year ago