From time to time, makers of hybrids and pure-electric vehicles all like to mention how much gasoline fuel their cars saved over the years in comparison with regular models, and General Motors is no different.
The Michigan-based carmaker did its math and discovered that ever since the Chevrolet Volt went on sale at the end of 2010, owners of the plug-in hybrid electric car have collectively saved a supertanker of gasoline after driving 40 million miles (64 million kilometers) on electricity and avoiding the use of more than 2.1 million gallons (8 million liters) of gasoline.
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