his is the HPI Savage XL Octane Ready-to-Run 4WD Gasoline-Powered RC Monster Truck. The Savage XL Octane comes outfitted with a 15cc gasoline engine with tuned pipe, 2.4GHz radio system, 6V rechargeable receiver pack, charger, and even the 2-stroke engine oil. All it requires is pump gas and a fuel container for mixing and pouring!