Mobil 1 Extended Performance 0W-20, 5W-20, 5W-30, and 10W-30 are made with a proprietary blend of high performance synthetic basestocks fortified with a precisely balanced additive component system, designed especially to help deliver performance and protection during long service intervals. Mobil 1 Extended Performance oils are uniquely designed to help provide outstanding levels of performance, cleaning power and engine protection, even during longer oil change intervals.