Tankeu discovered that this oil could be used as fuel. He then spent a year developing a formula for recycling the oil, and designing a stove that can use it in a safe kitchen environment.

When the taps are opened, fuel is dispensed into two funnels ... Mwangi added that once the old engine oil is ignited, the stove can run continuously for more than 12 hours, a single stove ...

Senior Jail Officer 2 Jayson Paglicawan, who introduced the "Kalan de Used Oil," said the stove offers a free and renewable fuel source. "As prices of LPG continue to soar in the market, these burners ...