Oscar Palavecino was born on December 18, 1959, in a village within Chaco Salteño, specifically on a ranch called El Ñato, which bordered Argentina, Paraguay, and Bolivia. The area was home to nearby Aboriginal communities, including the Toba, Wichí, and Chorote. His mother, Doña Estela, was 35 at the time of his birth and had to assume the roles of both mother and father. From a young age, Oscar contributed to the household expenses. When he was just nine years old, his mother fell ill, prompting the family to sell their few possessions and relocate to Tartagal with his brothers, Juan Pablo and Lucho, where they temporarily lived in their uncle's home.

Oscar attended school in the mornings while working in the afternoons to collect cardboard and bottles for recycling. His life took a tragic turn in 1976 when he lost his mother at the age of 17. Subsequently, he lived alone as his brothers found work in Salta. Juan Pablo brought Oscar to Salta to live with an aunt, who helped him secure his first job in the city, where he loaded and unloaded propane tanks. After completing two years of military service, he returned to his job at the propane company before transitioning to a career in transportation.

As a driver, Oscar enjoyed traveling routes that included Vespucio, Pocitos, Salta, and Oran, extending all the way to Buenos Aires. During this period, he began to pursue music more seriously, performing at small gatherings such as the “Gauchos of Güemes” and Don Johnny’s grill. These early performances helped him overcome stage fright and solidified his desire for an audience to hear him sing.

At the age of 25, Oscar joined his first musical group, The Pilcomayo Three, along with Negro Gómez on violin, Elvio Condoríen on guitar, and Oscar himself on percussion. The group toured northern Argentina and received a positive response, but it disbanded after the departure of the violinist.

Determined to form a new ensemble, Oscar enlisted Oscar Bazán for lead guitar, Don Lucas Cabral on bandoneon, Elias Balderrama on second guitar, and Pascual Toledo on percussion, later replaced by Dante Catan and Dante Delgadillo. Their first cassette was recorded with the help of Buenos Aires violinist Mauro Matos. Due to the high costs of recording, Oscar sought financial assistance from friends but still fell short.

While collaborating with Lucas Cabral and Oscar Bazán, Don Lucas composed the song "Gatito pa' Don Lucas." Their debut tape was released in 1987, and the zamba "Pa’ mis abuelos" achieved notable success in Bolivia. Oscar has often expressed gratitude to those who supported him throughout his journey, including Los Chalchaleros, Luis Landriscina, Raúl Portal, and Mabel Maharbiz.

With his group, Oscar began to tour the folklore circuit and returned to perform at Gauchos of Güemes. This success led him to record his second cassette, "Pa’l Tio Pala," in 1989, which surpassed the success of his first release.

Oscar's participation in the 1992 Preserenata culminated in the Serenata Mayor, where he performed alongside Don Lucas Cabral, Pascual Toledo, Mulato, and Oscar Bazán, paving the way for his appearance at Cosquín. At Cosquín, as part of the Salta delegation, his performance was outstanding, but his most significant opportunity arose when he sang a song that was broadcast nationwide, fulfilling a long-held aspiration since moving to Córdoba.

In 1993, Oscar left Tartagal and the propane company where he had worked for 11 years. Settling in Salta, he began working for the long-distance bus company La Veloz del Norte. In the following years, he balanced his job with his singing career, recording "El alma de Felipito" in 1995.

In 2007, he released the album "Chaco Escondido… Yo soy de alla." The following year, he presented "Abrazando al caudillo," a collection of 21 songs by esteemed Argentine composer Horacio Guarany, featuring a brief introductory speech by Guarany himself.

In 2009, Oscar toured the country with Los Nocheros and Soledad in a show called "La Fiesta," which resulted in a CD and DVD recorded on May 16, 2009, at Vélez Sarsfield Stadium in Buenos Aires. Natalia Pastorutti made a guest appearance on the track "Jamas," while Los Tekis collaborated on "Que no daria."

In 2010, he marked 25 years in music with the release of "25 years." The following year, he recorded "Mi cielo terrenal," which featured 14 songs. In 2012, Oscar faced the loss of his friend and lead guitarist Oscar Bazán, who passed away from lymphatic cancer.