Thanks, I think I'm going to go for the pipe insulation with cheap dowel-rods held on by zip ties. The tempatures around here keep fluctuating, snowing this morning then 45*F midday. Even if it doesn't help warm up my commute should be changing to more highway so I can have better aero for that. Oh and I don't have a baseline for the truck yet, I'm working on it, I finally filled up all the way this week. I'm going to start keeping track of my MPG's and working on improving it.
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