5 months ago i rebuilt my LS/vtec with some better parts, and my machinist used Clevite main and rod bearings, ensuring me they are fine for 8500rpm duty. well after 6000 miles rod #3 spun a bearing. when he took the block apart he said all main bearings look fine, along with rods #1 & 2. rod bearing #4 was flaking, which he says looks like what happens when gas gets into the oil. but since #4 was the only one to show this, gas in the oil can't be the case. i ran the first 500 miles with dino oil, did a change, and ran an add'l 3000 miles on dino before switching to Mobil 1 Trisynthetic. i never overreved beyond 8500rpm, and when the bearing let go i had just taken it to about 8000 and then shifted into second hard; right when i grabbed 2nd gear i heard a loud pop which was the bearing letting go. so now after 5 months i have the engine back out and apart, the machinist is telling me it doesn't look like a bearing failure, yet he doesn't know what caused the problem. he's trying to blame it on my stock (shot peened) LS rods, but i don't think that's the problem. does anyone have any thoughts on what might have caused my problem, and also on if the machinist is trying to screw me or if he's justified in his actions? right now it looks like he won't be paying for anything, even labor to redo it. sorry for the long post, but i like to fully explain the situation. for info on my car, go here.