1990 Plymouth Acclaim excessive white smoke from exhaust

This car runs great I just bought it and I love it but there is this xcessive white smoke issue it is overwhelming and I i did not notice in my blind love for the car but now that I have had it for a week I noticed it I put no smoke in with the oil that did not work I was told over the phone by someone that it might be head gasket I hope it is something as simple as adding lucas to the oil or changing the oil the car it did sit for 8 weeks before I bought it do you have any idea.

thank you
michael