Yep! Or at least, some kinda diesel equivalent fuel in their world. My loose guideline is that if our world had it in the 1920s, Keol can have it too (exceptions exist, of course).

There is a huge tech level discrepancy across different regions of Keol (which is loosely based on real life past Korea), for sure! Areas surrounding the capital have more advanced tech. Some of the bigger cities away from the greater capital area may have it, as well.