Well allthe GTR'S i have ever owned have never had engine rebuilds the first R33GTR i had for 86,000 miles from new at 440hp never a days problem in 3 years, my R34 GTR i had for 62,000 miles from new in 30 months at 440+ hp never a problem, Current R33 GTR 53,000 miles at 525hp no problem.
The key to ownership is warm them up to over 70 degrees oil temp before abusing, cool them down after ever run and never ever over REV! this combined with good oil changed frequently seems to work.
TOUCH WOOD!