Yoshi VS Fuelly

Yes. The app is called Yoshi and they will deliver gas and wash your car. I haven’t used it myself though, and I suspect it’s one of those only-in-the-Bay-Area apps funded by Silicon Valley venture capital. Source: about 2 years 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: 11 months 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: 11 months 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: about 1 year ago