The cooking oil would have attracted taxes equivalent to K207,979.92.
ZRA Corporate Communications Manager Mumbuna Kufekisa in a statement to QFM News says the trucks were impounded during enforcement activities over the past couple of weeks aimed at detecting smuggling of goods into the country.
Mr Kufekisa says the trucks were detained during the regular enforcement patrols in the Northern Region and also by the alert officers based at the Enforcement Centre in Kapiri Mposhi.
He says the cooking oil which was on the trucks was smuggled into the country contrary to the provision of section 149 of the Customs and Excise Act.
Mr Kufekisa says the matter is under further investigations and collection of taxes due on the consignment.
He states that ZRA is determined to curb and eradicate smuggling and ensure all due taxes are collected and the enforcement activities will continue throughout the year.