Was wondering if anyone is having issues with the new ultra low sulfur diesel fuel...we have a '05 Silverado with a Duramax that has been getting 16-19mpg loaded and with this new "stuff" (I'll be polite!) it's down to about 12-15mpg, and runs and idles alot more rough. The general line of horse-pucky I'm getting is that there should not be any issues as far as mpg and power loss, but the proof is there. We are OTR truck drivers and know how to properly drive and "treat" diesel engines, so I am at a loss unless it is actually the fuel. If so, is there an additive or something to use so we don't trash the engine in this beautiful new truck? Any help will be appreciated! Be safe and be well....Jenn

 

My dad has an '06 Duramax and has gotten 2 tankfuls of bad diesel, and it messes the injectors up royally.