Can anyone give me a rough schedule of when I should be getting checkups and for what?

I know I can get a free oil change @ either 5,000 miles or 6 months at the dealer.

When should I be taking in my is250 for regular maintenance?

 

uhhh... didn't you get some manuals with your car? every 5K miles bring it in, or every 6 months like you said.

 

AS PMok said, there should have been a maintenance manual delivered with your car. If you prefer a computer screen to paper, you can register your car on the "My Lexus" section of the Lexus website, and access the maintenance schedule there as well.

 

There is not a whole lot of maintenance. Like you said 5k or every 6months do the oil change. Tires can not be rotated because they are staggered. The manual has a nice table showing what needs to be done. I think it goes upto 120 or 140k miles.