I heard that Saudi crude was light sweet - that the tankers actually burn it straight out of the ground on their way here ....
It would have to be refined first. There are very light crudes that can be burned in a diesel engine, some possibly in gasoline engines, but it would not be good for the motor.
In some impoverished countries, people will drill into cross-country lines that transport light crude and NGLS (Natural Gas Liquids, come from of natural gas during production) to use in their vehicles and sell. It is an interesting safety and integrity concern to say the very least.
Long time no see, how you been?!?