The Harmonized Index of Consumer Prices category "Liquid Fuels (04.5.3)" is a classification of nondurable goods and energy that includes domestic heating and lighting oils.
This category is a subcategory of the Housing, Water, Electricity, Gas, and Other Fuels (04) and of Electricity, Gas, and Other Fuels (04.5) categories.
Information provided in the notes pertaining to HICP classifications can be found from the source at: http://ec.europa.eu/eurostat/cache/metadata/en/prc_hicp_esms.htm.
Copyright, European Union, 1995-2016, http://ec.europa.eu/geninfo/legal_notices_en.htm#copyright.
Eurostat, Harmonized Index of Consumer Prices: Liquid Fuels for Portugal [CP0453PTM086NEST], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CP0453PTM086NEST, May 25, 2018.