The polarizing 6.0 Liter Power Stroke was supposed to rise to the top of the segment, instead it's many problems caused its fall from grace.

While some studies suggest that apple cider vinegar may help lower blood pressure, the research is limited and inconclusive, especially since many studies involve animals or have other limitations.

Both Cummins and Ford offer 6.7-liter diesel engines. They share a few similarities, but those don't go much further than their displacements.