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