Excellent Homestyle Mexican Food. The favorite Mexican restaurant of North County San Diego, CA. Located in Oceanside, Davina’s is a family owned and operated Southwestern Style Mexican Restaurant, serving top quality dishes for over 15 years, opening on Cinco De Maio, 1991 (May 5, 1991). Davina’s is a casual, friendly, and family oriented restaurant, with fast service and top quality food. The dishes are always consistent, fresh, and well presented.