The UView 560500 Combustion Leak Tester Fluid Replacement provides a reliable method for detecting combustion leaks in gasoline and diesel engines. The blue test fluid changes to yellow when exposed to gasoline combustion gases and to green when detecting diesel gases, offering a clear and immediate visual confirmation of leak presence. Compatible with standard combustion leak tester tools, the formulation supports accurate diagnostics across a wide range of vehicle types. Its straightforward application makes it suitable for professional technicians and DIY users, helping streamline troubleshooting, identify performance issues, and support effective engine maintenance routines.