Greetings,
Has anyone else out there noticed an increase in their average mileage since the introduction of the new ultra-low sulfer diesel fuel?
I track my mileage religiously and commute with mixed driving conditions almost daily. With the old fuel (500ppm sulfer) I was getting a constant
18.5 to 19.0 mpg with my '04 Chevy 2500HD crewcab with the Duramax and Allison 5-speed auto. Since the advent of the new fuel (15ppm sulfer) I've been getting 19.5 to 20.0 mpg with the same driving. The only thing that has changed is the fuel and maybe the temperature has cooled down some (today's high will only be 80F). I did not notice these increases in mileage the last two winters so I don't think it's the weather. My new tires (which are slightly larger) have not been on my truck long enough for me to measure my mileage yet during my next fill-up.Anyone else see the same thing?
Cheers - Jonathan