You didnt say what your dipstick/pan combo was, but:

1. A mismatched dipstick/pan setup will cause this because the crank is throwing oil directly on the tube's bottom opening. (pull the stub tube out and find a longer one to tap back in.)

2. disconnect your exhaust siphons and rev the motor to see if they r working the correct direction and at idle or just high revs. (they might push air IN at idle, then suck at revs. ...leaking check valves.)

3. Has the engine been apart and a crank scraper or tray been installed or omitted...

Most engines with the PCV system removed and exhaust siphons installed will spit some from the dipstick tube at idle . Some need the PCV reconnected for idle crankcase venting and the Siphons still kick in a t revs.

Keep us posted. MIZ