Cucumber Rings

2 lg. cucumbers, thinly sliced
4 (4 oz.) cans pimientos, drained and sliced
2/3 c. vegetable oil
1/4 c. white wine vinegar
1/2 tsp. salt
2 c. sour cream
Mix together cucumber and pimiento strips. Shake oil, vinegar and salt together. Pour over cucumbers and chill 1 hour. Drain well. Just before serving, blend with sour cream. Chopped green onion tops may be added while cucumbers are marinating, if desired. Serves 12.