To me, as I stated before, this sounds like a PCV problem. Oil is bing syphoned out of the valve covers into the intake manifold.
I think you said that you don't have a PCV system, so I am stumped.
Are you using two cycle gasolene?
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.