Here is the link to the Ford Approved List of diesel motor oils.
Notice that the only Delo motor oil approved by Ford is the Delo 400 SDE in 10W-30, which is odd because according to Chevron's web site, it only comes in 15W-40 https://www.chevronlubricants.com/co...ae-15w-40.html
No Walmart Super Tech motor oil is approved.
Shell Rotella in T3, T4, T5, and T6 in both 5W-40 and 15W-40 are all approved.
Tractor Supply Traveller 15W-40 is approved.
2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, Odyssey extreme 65-PC1750T batteries, Michelin LTX-MS2 rear tires, Sumitomo Encounter front tires, Shell Rotella Ultra elc, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 250,000 miles, repairs so far: two starters, batteries, cps, brakes, tires, alternator, ball joints, locking hub, wheel hub, AC compressor, serpentine belt, power steering pump, driver's side window, ignition switch, o-ring, Spectra premium radiator, water pump, fan clutch, fan blades, thermostat, thermostat housing, tensioner. Stolen twice so far, but recovered both times with major damage.
2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.