Do you really believe the U.S. EPA is driving the emissions changes? Europe is putting pressure on the U.S. To follow their upcoming change to Stage 5. Japan is already using engines with tighter restrictions than the U.S. In small diesels. Even China would like to get there but their infrastructure is too antiquated to handle the better engines so instead the people wear masks to protect their lungs on the worst days. America is actually rather loose on their requirements compared to most of the first world countries. So oil spec - can somebody please post the EPA regulation that specifies what an engine oil used in a Tier 4 final engine must use? EPA śpecs the final emissions and does limit sulfur in diesel, but CJ-4 is a spec developed by the engine and oil companies as a requirement in meeting the emissions spec. You guys hit me at another bad time because this evening I learned of another schoolmate diagnosed with terminal lung cancer, a non-smoker who spent his career in our mines. Diesel soot? Dust particles? Nothing is for certain except that our miners suffer lung cancer at a rate 5 times higher than the standard population. Everybody has to go sometime but coughing blood out of your lungs gasping your last breaths?
