Synthetic Oil

[H2bill]

A question from a new H2 owner.... Is there a consensus here on synthetic vs. dyno oil? I was kind of surprised when I read my manual that the H2 didn't come with synthetic motor oil. Are there pros and cons unique to the H2 that I'm unaware of? I run synthetic in both my BMW car and bike. Do folks just switch over when they feel like it, or is there some other Hummer guideline? (With BMW motorcycles, the consensus seems to be to run dyno for a couple thousand miles before a switching to synthetic). Are there any warranty issues with going to synthetic?

I did a search but didn't find this particular question addressed. If the topic has been discussed (ad nauseum) here sorry, please post the link. Thanks.