On the spur of the moment, Peralta claimed that he had a band called Los Abuelos de la Nada (the Grandparents of Nothingness) which was ready to enter the studio.

As Molar did not call his bluff, Peralta actually assembled a band, featuring Claudio Gabis on guitar, Alberto Lara on bass, Héctor "Pomo" Lorenzo on drums, and Eduardo "Mayoneso" on keyboards.

After a brief period of drifting and fighting amphetamine-induced depression, in 1970 Miguel joined Pomo, Carlos Cutaia on keyboards, and Luis Alberto Spinetta on guitar, in a band called El Huevo (The Egg).

Miguel used to stay living at Guillermo's house near the beach, in which they both jammed and sang together many new and old songs, one of them, Verilí, included in Cazenave's album of duets Duplex (2002).

With Cachorro on the bass, the band was assembled: teenage phenom Andrés Calamaro (voice and keyboards), Gustavo Bazterrica (guitar), Daniel Melingo (sax), and Polo Corbella (drums).

The 1982 Falklands War (Spanish: Guerra de las Malvinas/Guerra del Atlántico Sur) was a catalyst for Argentine rock, as songs with English-language lyrics were not broadcast for several months.

Abuelo and his band wrote materials favored by radio DJs, including No te enamores nunca de aquel marinero bengalí (Never fall in love with that Bengali sailor) which grew out of improvisation during rehearsals, and Sin gamulán (Without a coat), written by Calamaro.

The 1983 debut album included many compositions by Abuelo-López, and a reggae hit by Calamaro's former partner Gringui Herrera, Tristezas de la ciudad (City blues).

For their 1983 album, Vasos y Besos (Glasses and Kisses), Melingo wrote his own reggae hit: Chala-man, Bazterrica contributed No se desesperen (Don't despair), and Calamaro chimed in with Mil horas (A thousand hours).

Sensing that the band was on the verge of dissolution, Calamaro and López persuaded Abuelo to record a live album in their last major concert, in the Opera theater in Buenos Aires in May 1985.

For the occasion, Gringui Herrera replaced Bazterrica, Juan del Barrio reinforced Calamaro in keyboards, and Melingo played some songs as a guest musician.

The band played one more gig in October 1985, in the José Amalfitani Stadium, to fulfill their contractual obligation to the "Rock and Pop" festival which featured INXS.

Late in 1986, he drafted Polo Corbella, Kubero Díaz, and sax player Willy Crook to form a new Abuelos band, which recorded Cosas mías in 1987 with relative success.

In late 1987, following gallbladder surgery, Miguel Abuelo was diagnosed with AIDS; terminally ill, he died from cardiac arrest a few days after his 42nd birthday.