oil pulled into cooling system. 1997 f150 4.6l v8 2wd

What is your question?

replaced radiator. changed oil and filter. refilled oil. 5qts. tarted truck let idle for awhile, turned off let set , checked oil level, no oil on dipstick.oil pulled into cooling system.

How long has your 1997 Ford F-150 had this problem?

awhile