interesting to say the least, back when USA diesel fuel went to 15PPM fuel, a very good shop specializing in Diesel fuel injection equipment said he liked the new fuel ,because his business increased by around 50% the 1st year!
there was a lot of warrentee combacks, especially on the older equipment ,well it seems , after much lawsuits & BS,the oil companies changed the refining conditions, and made additive changes also, and engine manufacturers made changes in pumps and injectors, mostly metalurgy stuff!
my personal experiance with actually driving a motorhome bus with an inline 6 GMC diesel, was 9 miles to a US gallon, after the new fuel came about, my MPG went down to 7 US MPG, YES it smoked less, and also made slightly less power, and oder was reduced!
so now i'm sure the planet will still be HERE, when the human race is extinct.LOL.