The excerpt used in this commercial is taken from Mascagni's Opera, Cavalleria Rusticana. The duet is between Santuzza and Turiddu - the opera is only about 1 hr long and this duet is about 12min long - this is from the "Turiddu, ascolta" section of the duet. I've sung the soprano part before and it still took me a while to figure it out!!
Opera
Carmen is the name of the opera and Habanera is the song http://www.splendad.com/ads/show/2698-Bertolli-Opera
placido domingo
Celeste Aida
It is "Recitar! Vesti La Giubba" from the opera Pagliacci. (the part you hear in the commercial is about 1:50 in).
I don't know their names but they are legitimate opera singers.
Denyce Graves.
maria callas
If you open a new private tab Opera won't save the history of the websites you visited in that tab
Without more specific information, it is difficult to identify the exact opera song used in a past car commercial. Many car commercials have featured opera music, as it can evoke a sense of elegance and grandeur. However, you can try searching for the brand or specific commercial online to see if any information is available about the opera song used.
From the sOap opera all my children
If you are talking about the commercial from around 1980, it was an improvised appoggiatura - according to the woman who sang it!