I recently purchased the Smart Oil Gauge from http://www.connectedconsumerfuel.com/product/smart-oil-gauge/
It seems to work well. Information about remaining oil is kept on a website or an iOS/Android app. They also have an Amazon Echo skill.
They do not have an API.
Is it possible to build a device handler that basically scrapes the data from the website? I’m really only looking to know how many gallons remain in the tank.