3.1GHz on e6420. 1.35 vcore. would raising it get me a better oc on air?

http://valid.x86-secret.com/show_oc.php?id=257500

Not too bad so far. Prime stable. load at 54. Might go for more when I get better cooling but for now I am happy. Or is it safe to raise voltage even more on air. I am running a cnps9500 zalman.

It is farily safe to go to 1.5 or 1.6v on air so long as your temps are below 70°c.