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Weigh that dude (CAT Scale Locator; Missoula & Milltown) and nail down tire pressure versus load as part of your baseline. And I'd be chasing steering wander as that, alone, will be worth more than aero aids short of long highway trips. Do the "fun" stuff (aero or elec fans) as time allows, and "serious stuff" (mechanical; which also includes brake drag & alignment) as funds allow.
I'd start, though, with electrical heating of fluids, year-round, to shorten warm-up time. Even where I live it is too long (time & distance). Partial grille block, etc.
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