I think the term I wanted to use is actually coast not cruise. Sorry.
Just found this in an article,
"What you should do is coast into the stopping point. During my research, there has been much conflict regarding the advice to coast in neutral, or stay in gear. So out on our track, we were able to conduct the necessary testing. Our results were astonishing. For most newer cars, staying in gear actually turned out to be more fuel efficient than going into neutral. Because, while in neutral, the car burns a small amount of fuel to keep your car from ticking over and stalling, conversely, modern cars can use the momentum of the gears to keep your engine going, and use no gas at all! However, there are two things to consider on this note. First of all, you have to keep in mind that staying in gear will slow your car down much quicker than being in neutral. So if you surf up to 80 mph and then cruise in gear, you may only be able to cruise for 1000 ft before you have to put your foot down again, versus the 1700 ft you can cruise in neutral. So for long sails at high speeds, go into neutral, and for short cruises to the stoplight, stay in gear. Secondly, keep in mind this only applies to newer cars, and my best guess from the experiments would be 2004 and up. For all the rest of us, neutral is still your best friend."
