Before you get full performance out of the HPI Savage XL Octane you will need to break in the engine. Once you’ve got it started for the first time, run it slowly with the factory carburetor settings for one full tank of gas. It should run for about 20 minutes. Do not try to get it up to top speed during this time. After the first tank of fuel you can then begin running your Octane at higher speeds. However, you are advised not to change the carb settings for at least two more tanks of fuel.