new to this forum. driving a 2007 HCH for about 6 months.

changed oil & filter, freshened tranny fluid and replaced air filter. also, pumped up tires to max. recommended pressure.

going on the road for the first time, about 850 miles, 1-way, from so. indiana to dallas/ft. worth, texas area: essentially flatland driving with summer temps.

question: does anyone have references or experiences to share about interstate driving, esp. what speed yields optimum balance between time and mpg?

thanks for your considerations,