_rcrogers6@kennett.net_ (mailto:rcrogers6@kennett.net) writes: Wasn't there a thread that spoke of a "black light" which revealed diesel leaks? Ron Rogers To Ron and the group, Don't know about a thread...but.....you add a die to the engine/trans oil and can use a black light to find an engine or transmission oil leak. There are also dies for air conditioning system leaks. Never heard of one on the fuel side however. Perhaps with some of the additives around IE Marvel oil etc someone with a black light could check. Carl Hibbard