![Exhaust emissions from tailpipe [photo: Simone Ramella, 2005, used under Creative Commons 2.0]](https://images.hgmsites.net/tmb/exhaust-emissions-from-tailpipe-photo-simone-ramella-2005-used-under-creative-commons-2-0_100644014_t.gif)
While significant sooty black deposits—and even, occasionally, visible puffs coming from the tailpipe—used to be a sign your gasoline car needed a tune-up, they’re a normal fact of life with many newer cars that are supposedly cleaner-burning. What’s the disconnect? While the modern gasoline direct-injection technologies... Gasoline direct injection tech might not be worth it, study suggests
While significant sooty black deposits—and even, occasionally, visible puffs coming from the tailpipe—used to be a sign your gasoline car needed a tune-up, they’re a normal fact of life with many newer cars that are supposedly cleaner-burning. What’s the disconnect? While the modern gasoline direct-injection technologies...