I can't really tell who's winning the argument, but I have run my truck in many different climates as I travel alot those range from -10 to 110. It's always noisy when it's cold, at least I couldn't tell a difference. I ran motorcraft 15w-40 after purchasing my truck and changed it every 3k, after about a year I switched to T6 @ 5k no additive, I've been running it for two years and have replaced less injectors than I had to with the motorcraft. I personally "believe" the thinner oil is keeping my injectors happy. The best thing to do would be to spend the extra $2.00 per gal. and try it out for yourself then maybe decide if you want to add any kind of additive.
Radiator, thermostat, heater valve, degas cap, EGR cooler; now deleted, Head gaskets, oil cooler, STC, stand pipes, dummy plugs, Upfitter switch, high idle mod. Motorcraft max batteries, Harley Davidson windshield x's 2, Scangauge II
RECON Big Rig Ice running board lights, interior LED light conversion, smoke LED tail lights, third brake light, mirror lights, fire & ice tailgate strip. ARP studs, Garrett powermax turbo, Metal CAC tube w/cool it thermo tec aluminized coating, Turbo oil supply and drain, Blue spring, Fuel/water separator drain plug, Goodyear Wrangler Duratrac 275/65R20 & Gatorback belt, Drilled/slotted rotors w/ceramic pads. IPR Generation 2 EGR & up pipe delete. IPR High flow coolant filtration system. JVC KW-NT700, Fumoto oil drain, block drain x's 2, Viper 5904 remote start & security, Rotella ELC conversion, CAT delete, tailgate assist, MBRP 5" turbo back SS, Atlas 40.