apiverve_gasprices

https://github.com/apiverve/gasprices-API

Gas Prices returns average retail gasoline, diesel and LPG prices from official weekly government surveys for the US, the UK, all 27 EU countries and the EU average. Pass a country, or a US state, region or city, to get the latest week with week-over-week and year-over-year changes, in any currency, per liter or per gallon.