I only travel about 15 miles each way on the freeway. It seems OK with 65, not screaming or anything, will really jump to 70, merges really well. Maybe this is just the first six I've had that wasn't beat, but this one is really spunky, I'm pretty surprised with it. Mileage hasn't been too too bad, 12.5 mpg w/1st tank, 16.4 mpg from second. Brian
