Our ULSD here in Oz (Australia) is 10 ppm... Yours is 15ppm I think.. Now in two chats with BP Techies at the Refineries, they claim no problem, there is a "Lubricity" agent added. But most vehicles here are Japanese diesels, so I wonder....?

I have 29,000 kms so far on my 6.0, and no problems.. But any harm in adding a litre of vegetable cooking oil or two stroke oil per tankfull of ULSD? Any help? Any good to it? What is the latest....
Best Regards from Down Under... Last Frontier in Oz, happily driving around through and over all the rice grinders with my Mega F-350 CC DRW LWB FX4 King Ranch...