I use the Amsoil Diesel Concentrate.
I know for you cold weather guys they just came out with the Diesel Recovery to get you going if you gell up and the Diesel Concetrate with cold flow improver to help prevent gelling.
[CENTER]2005 Silverado 4X4 CC LB LLY [/CENTER]
[CENTER]Air Lift Bags, [COLOR=black]Amsoil F2B[/COLOR], KB IOH Kit, BD Manifold, Fumoto Valve, PCV Reroute, Resonator Plugged, Mag-Hytec Diff Cover & Trans Pan, PPE X STD, 4" SS Magnaflow Kitty Ran Off[/CENTER]
[CENTER][URL="http://www.duramaxfilters.com"]www.duramaxfilters.com[/URL][/CENTER]