My attorney and his specialist partner attorney told me last year before applying for temporary residency...and once again this year when renewing temporary residency...that a naturalized citizen loses their citizenship by being out of the country for two years. There is an exception...you can extend two additional years (once only) at an embassy of Argentina. People get this confused with born Argentina citizens who can't even lose their citizenship if they want to.
I'm applying for citizenship next year at this time after completing my two years of residency.