The new TURBO3000D Sentinel monitors fuel pressure and provides early warnings on low pressure or abnormal pressure fluctuations to help prevent fuel system breakdowns. The Sentinel is available through Travel Centers of America and Petro Lube locations across America. The Sentinel is designed to be exclusively used with the TURBO3000D, which functions as a fuel/emissions reduction device. The TURBO3000D contains no moving parts. Its maker says it requires no maintenance and produces better fuel economy, increased horsepower, quicker throttle response and smoother idle.