The Quiet Peak of the Internal Combustion Engine
By Leon Stille - Jun 08, 2026, 2:00 PM CDT
- Global sales of gasoline and diesel vehicles peaked in 2017, with nearly all subsequent growth in personal transport captured by electric vehicles.
- EV adoption is increasingly driven by economics and convenience, including lower operating costs, less maintenance, and home charging.
- Oil market disruptions and geopolitical risks are strengthening the case for electrification, as countries seek greater energy independence and reduced exposure to oil supply shocks.
If you follow energy markets closely, you could be forgiven for thinking that oil remains as indispensable as ever. Every geopolitical crisis seems to reinforce the narrative. Tankers moving through the Strait of Hormuz dominate headlines, analysts obsess over crude price forecasts, and politicians continue to speak about energy security largely through the lens of oil supply.
Yet beneath the daily noise of energy markets, something remarkable has already happened.
According to International Energy Agency data, global sales of internal combustion engine vehicles peaked in 2017. Since then, despite continued population growth, rising incomes, and increasing demand for personal mobility, sales of gasoline and diesel cars have never returned to their previous highs. Meanwhile, electric vehicle sales have expanded at a pace few analysts predicted only a decade ago.
This is more significant than many people realize. The transition away from oil in personal transportation is no longer a future scenario that may or may not occur. It is already underway. The crucial tipping point was not when electric vehicles reached a certain market share, nor when governments announced future bans on combustion engines. The tipping point occurred when conventional vehicle sales stopped growing altogether.
That happened almost ten years ago.
Why Tipping Points Matter
Technology transitions rarely unfold in a straight line. For years they appear slow, uncertain, and vulnerable to setbacks. Then suddenly they seem unstoppable.
The internet followed this pattern. Smartphones followed this pattern. Solar energy followed this pattern. In each case, observers focused on the technology's shortcomings long after the underlying economics had already shifted. Related: The Iran Stalemate Could Be the Next Oil Supercycle Trigger
Electric vehicles increasingly resemble those earlier transitions.
The chart tells a simple but powerful story. Total global vehicle sales have recovered from the disruptions caused by the pandemic, but virtually all of the growth is now being captured by electric vehicles. Conventional vehicle sales remain well below their 2017 peak. Every additional year strengthens the conclusion that the future growth of personal transport is electric.
Many people continue to ask when electric vehicles will replace conventional cars. Increasingly, that question misses the point. The more relevant question is whether there is any realistic pathway for internal combustion engines to regain their former growth trajectory. So far, the answer appears to be no.
The Market Is Winning the Argument
One of the most persistent misconceptions about electric vehicles is that their success is primarily driven by regulation or subsidies. While government support undoubtedly played an important role in helping the technology mature, it is becoming increasingly clear that economics and consumer preferences are now doing much of the heavy lifting.
Electric vehicles succeed because, for many drivers, they are simply better products.
An electric drivetrain contains far fewer moving parts than a conventional engine. There are no oil changes, exhaust systems, spark plugs, fuel injectors, timing belts, or complex transmissions. Maintenance requirements are dramatically reduced, reliability is often higher, and operating costs are significantly lower.
Perhaps even more importantly, electric vehicles fundamentally change the fueling experience. For over a century, motorists have accepted the inconvenience of regularly visiting fuel stations because there was no alternative. Home charging changes that equation entirely. For millions of households, the car is fully charged every morning without requiring a special trip or a detour on the way home.
Once consumers experience that convenience, many become surprisingly reluctant to return to gasoline vehicles.
The transition is therefore increasingly being driven not by environmental idealism, but by practical consumer choice.
Energy Sovereignty on Wheels
The implications extend far beyond the automotive sector.
For more than a century, transportation has depended on a globally traded commodity extracted from a relatively small number of regions. That dependency shaped geopolitics, military strategy, trade relationships, and economic development. Entire foreign policies were built around securing reliable access to oil supplies.
Electric vehicles introduce a fundamentally different model.
Unlike gasoline or diesel, electricity can be generated from a wide range of domestic resources. Solar panels, wind farms, hydropower stations, nuclear reactors, and geothermal systems can all contribute to powering a nation's vehicle fleet. For the first time in modern history, transportation energy can increasingly be sourced locally.
This is particularly important for Europe, which has long struggled with energy dependence. Every electric vehicle powered by domestic renewable electricity represents less exposure to volatile oil markets and fewer concerns about geopolitical disruptions thousands of kilometers away.
The transition to electric mobility is therefore not only a climate strategy. It is increasingly an energy security strategy as well.
The Strait of Hormuz Is Making the Case for EVs
Recent tensions involving Iran offer a timely reminder of this reality. Whenever instability threatens the Strait of Hormuz, oil markets react immediately. The reason is obvious: roughly one-fifth of globally traded oil passes through that narrow waterway.
Yet every new crisis also highlights the advantages of reducing dependence on oil altogether.
Higher fuel prices make electric vehicles more attractive. Greater geopolitical uncertainty increases the value of domestically produced energy. Concerns about supply disruptions reinforce the appeal of transportation systems that rely on local electricity rather than imported petroleum.
Ironically, every oil crisis strengthens the long-term case for electrification.
The very events that remind the world how important oil remains also demonstrate why so many countries are trying to reduce their dependence on it.
A Faster Transition Than Most Expect
Many forecasts still assume that internal combustion engines will remain dominant well into the 2040s. History suggests caution with such assumptions.
Technological transitions tend to accelerate once superior economics combine with consumer acceptance. Electric vehicles are rapidly approaching that point in many markets. Battery costs continue to decline, charging infrastructure continues to expand, and manufacturing scale continues to improve.
Most importantly, consumers are increasingly discovering that electric vehicles are not merely cleaner alternatives. They are often cheaper to operate, easier to maintain, quieter, and more convenient to own.
That combination is extraordinarily difficult for any incumbent technology to resist.
The internal combustion engine transformed modern civilization and will remain on the roads for decades to come. But the growth phase is over. The future expansion of personal mobility is increasingly electric.
Looking back, historians may conclude that the decisive moment was not some future government mandate or corporate announcement.
It was 2017.
That was the year sales of oil-powered cars peaked.
Most people simply haven't realized it yet.
By Leon Stille for Oilpice.com
