It has been used as lamp oil, in leather tanning, in soap making, and as a lubricant for thousands of years. Its toxicity, Pongamia oil can be used as lamp oil / Diya oil. 2. Used in hair treatment, dark circle removal, foot cream, massage oil, and skin moisturizer. 2. Natural pesticide for plants & crops 3. Natural insect repellant at home 4. Its rich in Nitrogen, Phosporous & potassium for plants