I too posted some lengthy info about synthetics around 2 weeks ago. I've never used anything but Mobil 1 10W30 or 15W50 in any of my TR's. It's just superior lubrication. Yes, you can go a little longer between changes (normal driving conditions), but don't fall prey to the myth that it can go 7k or so. The biggest need for oil changes is due to contamination/debris that gets in the system and causes it to be unclean. Synthetic does not "break down" as quickly as conventional motor oil, and it also tolerates high temps much better. I typically go 4-5k between changes on my LS1 daily driver, but on the GN, I still change it at 3k or sooner. It's not a daily driver, so the timeframe between changes is a little longer, even with the low mileage.
I've torn down motors over the years that have had conventional oil all their life, and motors that have been strictly synthetic, and the syn motors definitely looked cleaner, and less surface wear. All C5 Corvettes come with Mobil 1 from the factory, so GM obviously likes it too.
If you're worried about it burning more, that is not an affect of the synthetic formula, but rather the oil thickness. If you're motor is semi-loose, or has leaky seals, then the only way to compensate with oil is to run a heavier weight. My previous motor had loose tolerances, so I always used Mobil 1 15W50, and it worked fine.