STP Carb Spray Cleaner: Cleans carburettors, linkages and Automatic Chokes. STP Stands For Scientifically Treated Petroleum. Formed In 1954 In The United States The Company Has A Strong History With Motor Racing That Has Allowed It To Demonstrate The High Quality Nature Of Its Products. Engines, From Motor Vehicles To Boats And Even lawn mowers all are affected by grease, grime, oil and dirt deposits. These small but significant elements can all build up to affect the performance of the engine itself. STP Heavy Duty Brake Parts Cleaner: Uneven breaking noise and chattering can be caused by break shoe and pad lining dust, brake fluid seepage and slippery road film that contaminates break drums and rotors. Use STP Heavy Duty Brake Parts Cleaner to clean brake fuid, oily road film etc,. The unique formula will help improve brake action for a smoother, surer more dependable performance. STP stands for Scientifically Treated Petroleum. Formed in 1954 in the United States the company has a strong history with motor racing that has allowed it to demonstrate the high quality nature of its products.