Oil from Jatropha seeds is typically extracted using mechanical pressing (expeller press) or solvent extraction (e.g., with hexane). Mechanical methods are common in decentralized, small-to-medium operations, while solvent extraction yields more oil and suits industrial production. Pre-treatment like seed dehulling and drying improves efficiency. A two-stage system—pressing followed by solvent extraction—is sometimes used to maximize yield. The resulting oil is then filtered and refined before undergoing transesterification, often in systems like the GlobeCore USB biodiesel plant, which ensures efficient, high-quality fuel production.