https://www.cummins.com/news/release...ngine-act-expo
Internal combustion engines have come a long way since the 70’s. Especially the diesels! Heck, if you didn’t know my F350 was a diesel you couldn’t tell as quiet as it is. And with the emission system you can’t even smell any diesel from the exhaust. Even the big Peterbilt we drive has no exhaust smell. And obviously it’s working. When I was stationed in California in the 70’s the air was yellow with smog. The air out there is MUCH cleaner today.