Duroil For Men - Penis enlargement oil Duroil is a fusion of western and eastern spices, herbs and natural oils that has been traditionally used by men as a massage oil to naturally enhance erection, size and reduce pre-mature ejaculation by way of massage or topical application. Duroil's latest formulation is EXTRA potent as it contains extracts of active ingredients infused via Duroil's proprietary production method in a Good Manufacturing Practice (GMP) Facility. Duroil is formulated to increase penis size and enhance erections via topical application. Using DUROIL and 15 minutes of self massage exercise, you will get your desired enhancement and enlargement results.