Sure, if we build out refining capacity for the next ten years. Then we're golden until we run out of the finite well of combustible dead algae. So if you think we can revitalize American manufacturing and resource processing starting now, and you're okay with those investments being worthless in a few decades, and you don't give a shit about rendering the planet significantly less habitable to human life, then yeah, we're totally self-sufficient with fossil fuels.

Or we could, you know, pull energy out of the air and sun, a strategy which will be viable until our star dies.