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"Reduce fuel efficiency by 50%"? Did that really happen? I have driven a number of diesel cars over the last 20 years and the power-to-displacement ratio and fu
by tom_ 3y ago
"Reduce fuel efficiency by 50%"? Did that really happen? I have driven a number of diesel cars over the last 20 years and the power-to-displacement ratio and fuel economy have improved somewhat over that period.
- linksnapzz 3y agoA new diesel pickup, with the EGR/SCR/particulate filter removed or bypassed, will routinely go from 9-10mpg to 18-19mpg. I have seen this with the current 6.7 Ford Scorpion-series Powerstroke V8 in an F-350.
- tom_ 3y agoInteresting, thanks. I've always found the manufacturers' figures to be optimistic, but the real figures do seem to have improved over time. Perhaps not the case with trucks.
- linksnapzz 3y agoIt’s the same. The gains made possible by new technologies for extracting more output from a given quantity of fuel are balanced by the regressions caused by new technologies to ameliorate emissions. With the emissions-controls reduced to what was legally required in 2003, a new-ish Mercedes E-class diesel is efficient enough to drive from Framingham MA to Beloit WI on a single tank of fuel, at highway speeds.