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If you are really concerned about lubricity, bio-diesel will provide all that you need as low as a 2% blend. Ford okays a B5 blend, but it has to be a quality bio-diesel.
I have had zero issues with ULS diesel and fuel quality is not the best in Montana. Reminds me of when I was kid and the issues then with unleaded fuel.
I personally think that additives are a waste of time and money, except for winterizers to lower gel points. I saw no improvement with Stanadyne or PowerService.
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'00 F250 XLT 4x4 (born on 6/00), manual tranny & hubs, SPA Techniques EGT/Boost Gauge, Homemade HX Crossover Mod & Return Fuel Regulator, Toro Liner, 203* T-stat and Coolant Filter, LUK Clutch, flywheel & pressure plate, Amsoil Dual Bypass Filter
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