I have an F25C [bought last week] and towed it with a 1999 C2500 Suburban w/350ci base motor in "D" all the way. The wind doesn't seem to bother it because the truck seems to force the the boat straight in cross winds with its own slipstream. I got 11-12.5mpg at 70mph all the way back to Dallas from Denver. I went east to 287 and south to Amarillo...didn't go throught Raton Pass. I have seen smaller vehicles pulling the Fboats around but they really seem to need a 3/4 ton something because these trucks come with heavier suspension, tires[E load range] , oil coolers, transmission coolers [my water temps ran 190 in 95-102F weather last week].
fair winds,
thom
F25C 009 Charisma
ARC22 #2234
FMS SC20 57