Words mean things. Murder requires the intent to kill. Occasionally people are murdered by someone with a car, but an accident - even an entirely avoidable accident caused by gross recklessness - is not murder.
Some jurisdictions have the felony murder rule (abolished in the UK in 1957). That means it could be murder if you kill somebody while committing a felony, which includes drunk driving and fleeing in a police chase (and things like forgery and cybercrime, less relevantly).
In the US, depending on the state, murder need not require intent to kill or cause death. For example, 3rd degree murder in Minnesota explicitly states that the perpetrator acted without intent to cause death [1].
The theory behind murder requiring intent is very reasonable but, at least by statute, isn't actual legal practice.
How does the saying go? "If you want to kill someone and get away with it, kill them with your car!" We are so lenient on traffic violence, at least in the USA.
