Mini 4WD Motor Break-in Oil - Specifically for Carbon Brushes Experience the difference. Optimized break-in oil for Mini 4WD motors, perfect for breaking in brushes and commutators. Achieve consistent rotation and a smooth, extended run. From "just breaking it in" to "breaking it in with a purpose." Through independent development, we've created an oil that, with just a few drops, cuts carbon brushes and provides excellent lubrication and conductivity. 【How to Use】 Apply a few drops from the motor's end bell opening. Simply run the motor for about 5 minutes at 3V using a motor break-in machine! Afterward, test it on the track. Detailed instructions will be included with the product, but if there is no shaft wobble, the rotation speed should be around 35,000-37,000 RPM, depending on the individual motor. 【Precautions】 Be careful not to overfill. Keep away from fire. 【Capacity】 Approximately 8ml I've personally purchased various similar products on flea market sites, but none of them provided the desired results, which led to the development of this product. Also, please understand that speed isn't just about rotation, and then give it a try. We are Currently on a winning streak at Station Challenge #motor #originaloil #breakinoil #mini4wd #tamiya #famousracer #gradeup