The LeakFinder LF2008 dye can also be referred to as LeakFinder oil leak dye, Tracerline LF2008 UV dye, automotive fluid leak detection dye, oil-based fluorescent dye, and 8 oz leak detection dye. The LeakFinder LF2008 is an oil-based ultraviolet fluorescent dye used to locate leaks in automotive fluid systems (oil, fuel, transmission, power steering).