[JSH]

Originally Posted by jcp123

As a trucker myself, I’ll tell you that the trailer tails were a thing about 5-10 years ago, but I am guessing it wasn’t worth the cost. My company dabbled in them. Of the maybe 10 trailers I’ve pulled with one, I could not tell the MPG difference, most were broken, and it can make backing up harder. All of our trailers, though, have skirts. The tractors have had these soft (but flimsy) wheel covers for a while, but the newest trucks like my 2020 Cascadia P4 have some nice full metal discs. They’re also exclusively getting automated manuals now, and after 43k miles, although I miss my find-em-or-grind-em 10-speed, it’s made the biggest mpg difference I have seen in the fleet, easily worth a full mpg, or 10-15%.

More than 90% of Cascadias are sold with the DT12 automated manual for the fuel economy benefits and ease of use.