Well as a notorious "gunner" I have never ran into any problems from red-lining. I have even ran my car for hours pegged out on a cross country drive... the only thing that came out of it was 26MPG and making the pavement wrinkle! Then again, I only have 100k on my stock engine. I do know that on cold mournings, it's good to warm it up for at least 30 minutes. And it's actually good to rev up your teg every now and then, since it helps clean out your exhaust... as learned from an old crazy Irish man