I had a similar experience running WMO (from multiple unknown sources) in my 84 6.9 IDI. Lots of blue smoke, stalling and surging, and very unpredictable. I abandoned the project and, thankfully, after hooking a fuel can with a high concentration of Diesel Kleen up to the IP, I was able to get the truck to behave normally again.
I had a similar experience with the same fuel in an 83 Mercedes 300SD. Low power and lots of smoke.
I was using a centrifuge (5-10 passes) and mixing with 10-20% RUG. I could never get the truck to play nice with it.
I have no doubt these trucks can be made to run well on W85 (or what have you) but it didn't work out well for me.
Four wheels: '04 Chevy Tahoe, 5.3, 4L60E, 88k. '92 Chevy K2500 Silverado, 5.7, 4L80E, 330k.
Two wheels: '82 Honda GL1100 Goldwing, 38k, '90 Kawasaki KX 250, '83 Kawasaki KX 80 bored to 125, '96 Yamaha PW 80
Past: '84 F-350 6.9, '86 F-250 6.9, '88 Bronco II 2.9, '91 Explorer 4.0, '94 F-250 7.3, '94 F-250 351w, '97 F-250 351w, '99 Escort 2.0, '04 F-350 6.0 PSD