08 RX-350 Oil Service Due Computer?

[RubberArms]

I just picked up a used 08 RX-350 with 27K miles. In my other two vehicles (BMW and Honda), there is a computer readout available in the car that tells me how many more miles I have to the next oil service is due, and I have to reset this when I change the oil each time to let the car know to restart the oil service life timer. The BMW even dynamically extends or reduces the oil life based on how you drive the car.
I've looked all over the RX-350, but cannot find anything like this. Am I missing it, or am I just supposed to have the oil changed every 5,000 miles, period? Note: The little decal on the upper-left corner of the windshield was written using some kind of marker that simply wore off when someone cleaned the window. It is no longer legible.
The car looks flawless on the outside, inside, and even in the engine compartment it is very clean, so I don't think the previous owner lived on a dirt road or anything. I don't want to change the tranny fluid, and I don't want to go for the full monty 30K service $$. What reasonable, prudent maintanence items would you reccomend in my situation?