I recently made a long trip in a Metro. For about 50 miles I was able to "draft" a truck against unfavorable winds. I put draft in quotes because my following distance was typical for what you'd see on urban freeways; I'd have been comfortable going in much closer but I appreciate that it ticks some truckers off. Luckily the one I was behind made no indication of being bothered. However, the next one I attempted to glom onto came to a COMPLETE STOP in the left lane. Hmmm... suppose he didn't like drafters?
Funny how what is completely acceptable to one guy makes another lose his freaking mind.
Anyway, got 47.3 mpg with many segments at 67 mph, and many segments with unfavorable VERY STRONG winds.