Hopefully this does not set off another oil war. I am seeking informed and unbiased opinions and experiences with these products. 15w40 is the viscosity of choice. I do not believe that Premium Blue Extreme or Delo Syn. have application in north Texas. I drive conservatively 60 miles round trip to and from work daily-all highway, with moderate towing on weekends--load weights not exceeding 16k lbs. Any information would be greatly appreciated. I am new to owning a CUMMINS, have driven 5 or 6 in the past.
THANKS
THANKS