Dangote made the call on Saturday when he received the leadership of the House led by Speaker Tajudeen Abbas and his deputy Benjamin Kalu.

To carry out the investigation, he urged the House to set up a committee to test products at various filling stations across the country.

Decrying the damage being done to vehicles and engines by substandard products, also called on the House to investigate the quality of laboratories being used to test imported products and compare that with the one at the Dangote Refinery.

He informed the lawmakers, who had earlier toured the refinery, that he was also open to independent testing of his refinery’s products as that would only attest to their quality while exposing the problem with some of the products being sold by other players in the sector.

The management of Dangote Refinery has complained in recent months about what they say is an attempt by international oil companies (IOCs) to sabotage the refinery. It has also decried what it says is the importation of substandard products.

In turn, the refinery has been accused of essentially pushing for a monopoly.

Dangote, however, dismissed the monopoly claims insisting that the Dangote Group did not receive any special incentive when the refinery was being built.