A US highway is an all access highway, like a main road; it includes businesses, houses, and direct intersections. Top speeds on the average US highway are 55 mph. An interstate highway is a limited access highway that is meant for commute. It includes no property entrances, and interchanges at high speed. Speeds range from 65 to 75 mph (about 90 to 105 km/h).
At highway speeds, YES!
Its a power dive. It actively flies while it is diving.
They "reset" while driving at highway speeds.They "reset" while driving at highway speeds.
I have a 1999 Chevy Malibu with a four cylinder. I drive a combination of city/highway including hwy speeds of 70-75mph and get a combined average of approximately 24-25mpg regularly. If driven at slower speeds while on mainly freeway you can get up to 28-29mpg but I have only done that acouple of times to see what I got.
On a race car they help to provide downforce, helping the car stay on the track. On a normal vehicle traveling at highway speeds, they are mainly for looks, and provide very little downforce.
Blazing Red, Diving Blue or Rising Orange
If by this you mean only "hot heat" when drive at highway speeds likely thermostat bad and/or almost stuck and takes long time warm up from high engine RPM during highway driving.
Warrego Highway is open as of 14/1/11 from Toowoomba to Dinmore with reduced speeds on many sections.
I don't use mine until I reach highway speeds.
running out of gas??
The distance behind the car you are following