Originally Posted by rattleNsmoke
Coot, a lot has to do with the mileage gains when the EPA stuff is removed and, if anything, waking up a potent diesel motor that's been choked down due to Gov't restrictions. Less skinny pedal effort to get a heavy trailer rolling equals better fuel economy. At least that's the way I see it right, wrong or indifferent. Modern 6.4L diesel's are not the coal burners of old as you know. They burn ultra clean diesel and actually need cetane booster with lubricants to keep from scoring vital components. Gone are the days when you'd see a semi belching out black smoke when hauling a load. You and I come from a simpler era when 'if it ain't broke, don't fix it'. It's not broke, just choked. Cheers!
And how long will it take to recoup the $2,000-$4,000 spent at a rate of 2 -3 mpg while towing? That's like trying to recoup $10,000 extra for a diesel to gain 8 mpg paying $0.50-$1.00 extra per gal. Have to drive those suckers many, many miles to get it back. Oh, well, we had our fun back in the 50's-80's souping up cars, but we didn't try to justify it, it was just FUN!