* Steam was the most common fuel used in early cars. Steam engines were well-established technology at the time, and they were relatively easy to adapt to use in automobiles. Steam-powered cars were typically heavy and slow, but they had the advantage of being able to travel long distances without needing to refuel.
* Electricity was another popular fuel used in early cars. Electric cars were quiet and easy to operate, but they had limited range and were expensive to build.
* Gasoline was initially not widely used in early cars because it was considered too dangerous and difficult to handle. However, gasoline-powered cars gradually became more popular as the technology improved and the price of gasoline came down. By the early 20th century, gasoline had become the dominant fuel used in automobiles.
In addition to these three main fuels, there were also a number of other fuels that were used in early cars, including alcohol, kerosene, and hydrogen. However, these fuels were never as widely adopted as steam, electricity, or gasoline.