> a tiny oil leak from under the car the source of which is yet to be

> determined.

THIS is typical.

to change and to flush it they just keeping draining,

> refilling, and running the car over and over until its clean. Is that

> the way its supposed to be done?

YES. Standard operating procedure. There must be SOME sort of screen in there, though.

> Is the turbo water cooled , oil cooled, or both? Would adding a turbo

> timer benefit me?

YOU can't do a turbo timer because of the alarm system. Turbo is water cooled, and oil lubricated/cooled. I suggest you switch to synthetic. When you bring the car in for the T-belt, you might ask if an Amsoil-type engine flush would make sense in your case. You didn't say how many miles are on the car.