Automatic transmissions use about 5% more fuel.

My first car a Mercedes 200 (very used... <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />) had a fantastic manual. It gave fuel mileages throughout it's speed range. Best mileage was around 30 mph or 50 km/h.

If there is a headwind, try driving at night as there is normally less wind. This will save fuel and make for a lot less road weave. Also less traffic. Also air is denser, so you have more power.

I have a question. I have never towed my Tiger on the highway but may be doing so next summer. How is it in the wind? Will be using a Toyota Rav4

Mary, the air tabs? www.airtab.com sounds like a great idea. At USD $ 2.50 each, you need 3 per foot, so for a van or truck the investment would be low. Just a matter of having to answer all the people who say... "whas dat?"