Do you have any restrictors any where in the galleries? I agree that they need all the oil they can get. I have I think Mopar performance roller tip rockers that have squirt holes for the springs and the pushrod tips also. I put around 3000 miles on a set of springs with no issues. Also on the the pushrod oiling thing, I had a set of lifters like that by mistake and it screwed up the oil pressure like crazy. Most of us street guys running big cams with stiff springs I think need to put new springs in every now and then.