Crankcase Oil Contaminating Yanmar Diesel Fuel

[SuW]

Originally Posted by swordds

Thanks, the entire ~ 8 gals (- 30 liters) of contaminated diesel fuel has been transferred to the very helpful local boatyard. They keep a 55 gal waste fuel drum and when the waste fuel drum is full it is probably transferred to a commercial hazardous waste management company.

Who sell it to someone with a less picky application than a marine diesel.
My favorite was some steam train in the UK, but around here the HVAC guys who work in home heating all run oil-based home furnaces :-)

[hirondeller]

There are fluorescent tracer dyes used to find oil leaks (see the link below), in your case you would add the dye to the crankcase and see if the dye appears in your fuel tank. If it does not not, the 'black' contamination is coming from somewhere other than the crankcase engine oil. You will need a UV light and a darkened environment to see the fluorescence in the fuel. Check the dirty fuel first, to find any background 'glow', before adding the dye.



Here is a different use, wherein the dye is used to see where the crankcase oil is leaking onto auto engine parts.

https://www.youtube.com/watch?v=B3P5Ntqb_pU

Happy DYI'ING .