Review on 💥 Innovative Performance Chip/Power Programmer for Cadillac Seville, STS & STS-V (3.6L - 4.9L) – Enhance Fuel Efficiency, Boost Power & Save on Gas! by Jake Meyer

Claims of increased mileage and increased performance automatically make me skeptical, plus there were no product reviews, which added another layer of concern. But I ordered anyway. And I'm glad I did! Installation was easy; The instructions were clear, concise and precise. The instructions also warn that it could take several days for the integration and change process to work. So the day after the installation, I made a three-day trip of thousands of miles. I have owned this car for about six years and have made many long journeys. I've never seen average fuel economy exceed 20-21 mpg. (I have a bit of a forefoot.) I didn't skimp on the gas on this ride, hitting it occasionally like I normally would, and my average was over 23mpg. I cannot confirm the increase in performance; It used to be fast, now it's fast. So far, so good.