First, let's hop in the way back machine. Oil is not new. One does not need a 50 million dollar refinery in order to use it.

Here's the Wiki Data:

The Chinese were among the first civilizations to refine oil.[6] As early as the first century, the Chinese were refining crude oil for use as an energy source.[7][6] Between 512 and 518, in the late Northern Wei Dynasty, the Chinese geographer, writer and politician Li Daoyuan introduced the process of refining oil into various lubricants in his famous work Commentary on the Water Classic.[8][7][6]

Crude oil was often distilled by Arab chemists, with clear descriptions given in Arabic handbooks such as those of Muhammad ibn Zakarīya Rāzi (854–925).[9] The streets of Baghdad were paved with tar, derived from petroleum that became accessible from natural fields in the region. In the 9th century, oil fields were exploited in the area around modern Baku, Azerbaijan. These fields were described by the Arab geographer Abu al-Hasan 'Alī al-Mas'ūdī in the 10th century, and by Marco Polo in the 13th century, who described the output of those wells as hundreds of shiploads.[10] Arab and Persian chemists also distilled crude oil in order to produce flammable products for military purposes. Through Islamic Spain, distillation became available in Western Europe by the 12th century.[11]

In the Northern Song Dynasty (960–1127), a workshop called the "Fierce Oil Workshop", was established in the city of Kaifeng to produce refined oil for the Song military as a weapon. The troops would then fill iron cans with refined oil and throw them toward the enemy troops, causing a fire – effectively the world's first "fire bomb". The workshop was one of the world's earliest oil refining factories where thousands of people worked to produce Chinese oil powered weaponry.[12]

Prior to the nineteenth century, petroleum was known and utilized in various fashions in Babylon, Egypt, China, Philippines, Rome and Azerbaijan. However, the modern history of the petroleum industry is said to have begun in 1846 when Abraham Gessner of Nova Scotia, Canada devised a process to produce kerosene from coal. Shortly thereafter, in 1854, Ignacy Łukasiewicz began producing kerosene from hand-dug oil wells near the town of Krosno, Poland.

The world's first systematic petroleum refinery was built in Ploiești, Romania in 1856 using the abundant oil available in Romania.

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The first car was:

The Benz Patent-Motorwagen ("patent motorcar"), built in 1885, is widely regarded as the world's first production automobile,[1] that is, a vehicle designed to be propelled by an internal combustion engine.

After developing a successful gasoline-powered two-stroke piston engine in 1873, Benz focused on developing a motorized vehicle while maintaining a career as a designer and manufacturer of stationary engines and their associated parts.

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So with that as the baseline - oil, refined petroleum, and the combustion engine have been around for more than 115 years - we're probably set to move forward to talk about fields, oil wells, refining the amounts needed to supply a modern society, and what happens when you decrease demand by few billion people or so.