I've put 140,000 miles on my SR (it came with about 60k on it out of the front clip back in 2005). The last 14k miles it was putting out 343whp/334wtq. I never ran ANYTHING but Royal Purple 10w40 oil and OE Nissan (or K&N filters when the dealer was out). Nothing but that, ever. Checked the compression before I pulled it for my motor build, perfect compression across the board. Took the engine apart, and the original bearings looked perfect (see picture below). With my new motor build, I'll be running Rotella 15w40 for the break in, and back to royal purple when it's ready for synthetic. Royal purple has the highest film strength in the industry, which is why I run it.

S13 SR20DET Rod Bearings with 200k miles on them with last 140k using Royal Purple.