what kinda turbo do you have and are you running a restrictor? i have never ran one but have heard from reliable sources that on a turbonetics turbo you should run a restrictor. supposedly those turbos are bad about blowing seals with high oil pressure..thats why you need the restrictor. just some thought for you...

and like the others said make sure the oil return is a constant flow...no lops or low spots. also what size are you using? if you are using a small one like -3 or something thats your problem. i used -10