[slowmover]

Just got back from a 800-mile roundtrip to Fort Worth, with some observations. Temps on the way up dropped from around 60F here in South Texas to just below freezing at my destination. Engine temp never dropped below 187F with grille block in place and mpg was 23 despite fighting a 20-mph 3/4-headwind (with gusts past forty) the first 150-miles. Trip was run at 58-mph or 1,725-rpm.

Temps came up quickly. Never more than seven miles to op temp the following days. The return trip was on an alternate route (non-Interstate, and hilly compared to northbound leg) and overhead stayed consistently at 26-mpg (corrects out to just under 25). Haven't refilled, but will be northbound again in a couple of days (buying new travel trailer) on Interstate.

24-mpg is the now old baseline. But it was not ever run in consistently freezing or near-freezing weather. So anything close is a win in my book. So far, so good.