Depends on how hard you drive it. I let mine sit for about one min maybe two. My turbo has 106K and still good to go. I replaced the oil line orings about a month ago because they were leaking. But the turbo is fine.
where did u get the o rings for the lines mine are leaking too
dealer. pick up the gasket for the block also. take off the oil return line at the turbo and block. 1 o-ring / 1 gasket.
Part numbers can be found in this thread
http://www.mazdas247.com/forum/showthread.php?t=123719706
im at about 82000k and i let it sit for about 2-3 mins then shut the car off. everything good so far..thanks jus got the car a month ago.