Which oil?

I went to Rotella when i started running turbos before that i ran Castrol 20/50 but in my turbo Dakota it has had the Rotella in it sense it was a new short block from the dealer it has been a street/strip ride it's got roughly 25000 miles i beleive its all in how you keep it serviced i changed oil in it about every 1500 miles though but that was because i was always in boost every time i drove it LOL!