Any wars related to oil are about other countries' dependence on foreign oil and refining.
This implies that only they have an interest in starting oil wars, but of course it suits the US to be able to inflict supply shocks on other countries. This is an ancient military strategy which the US has leveraged in the past, eg in the runup to WW2. Under the current administration however, it seems to be imposing them indiscriminately, hurting erstwhile allies as well as opponents.