One interesting point: prior to WW1
electric cars were a common competitor to gasoline powered cars, and in Britain particularly
steam powered lorries were still competing with internal combustion engine models. Electric transmissions were also a
popular concept amongst automotive designers.
Now, none of these technologies were at all likely to become the dominant form of motor transportation, and the economies of scale that companies like Ford were starting to achieve were likely to drive them out of the market whether or not the war occurred. However, WW1 and its mass truck purchases by effectively every army in the conflict (though to varying degrees, of course) which were made for gasoline powered models since those were clearly superior in the long range military transport role undoubtedly helped speed the transition. A longer transitional period with more efforts by manufacturers tied to models other than the ICE (note that Doble Steam Cars operated into the 1930s OTL) presumably would result in more research on items like electric transmissions, which even if they failed to make a difference at the time (and without significantly better batteries than the lead-acid ones available in the 1920s, electric cars are screwed) might have hastened the development of electric cars decades later, when gas shortages or climate change provide corporations with the motivation for change.
While I'm on the topic, the geopolitics of a Middle East where the Ottoman Empire hasn't been forced out of the Arabian peninsula by forces tightly allied to Britain and France; and Iran has not been occupied by Britain and Russia, are obviously going to be very different. Oil gluts and shortages in various parts of the world may be more or less common depending on butterflies: given the importance of oil in developed 20th-century economies OTL those changes could have huge, difficult to predict spillover effects in all kinds of technologies.