Mobil 1 98JD37 10W-30 High Mileage Synthetic Motor Oil - 1 Quart Contains a seal conditioner to help prevent or control seal leaks in higher mileage vehicles Proven protection of critical engine parts from lubrication related failure for 5,000 miles or 6 months, whichever comes first Extra cleaning performance to help prevent the formation of sludge and harmful deposits Outstanding wear protection under a wide variety of operating conditions Meet latest industry fuel efficiency requirements