How long before oil change with syn?

[Beatdown Z]

I change mine every 3-5k. I consider the 3k "rule" as more of a... recommendation. Like speed limit signs you know? I never let it get past 5k though. Generally, at 3k I start looking for time to do it between work and school and trips home. Sometime in the 2k miles after that it gets done.

That sounds exactly like what I do, except my numbers are more like 4-7K.