It's oversized for SpaceX's current rockets (a single F-1 has more thrust than the entire Falcon 9 first stage). SpaceX has plans for bigger rockets and engine

It's oversized for SpaceX's current rockets (a single F-1 has more thrust than the entire Falcon 9 first stage). SpaceX has plans for bigger rockets and engines, but those are rumored to involve different fuels, perhaps for reusability. (Kerosene, the fuel for the F-1, and the Falcon 9's Merlin engines, gunks up the engine's innards a lot more than liquid methane, which is the rumored fuel for their next generation engines. If de-gunking would require a rebuild after a few flights, it's something you might prefer to avoid. The technical name for "gunking up" is "coking", if you'd like to read more on it...)