Theoretically, we're pretty close if you count birds and lizards to be pretty close relatives... but also, it would be improbable to have consumed 1.3 trillion barrels of dead dinosaurs, have somewhere between 3 and 8 trillion barrels in the ground - or maybe more but certainly not less. I don't know where oil came from, but I doubt that this much of it was dead dinos. I am also unconvinced that all dinosaurs congregated to Texas, Alberta, and Saudi Arabia to die. You can call me a skeptic if you want.