No, you cannot refill an Oxbar vape. Oxbar vapes are designed as disposable devices, meaning they come pre-filled with e-liquid and are meant to be used until the battery or e-liquid runs out. Attempting to refill them can damage the device and may result in leakage or malfunction. If you're looking for a longer-lasting option, it's better to choose a device with a higher puff count or consider a refillable vape system specifically designed for multiple uses.