Castrol® EDGE® High Mileage 5W-30 is an advanced, fully synthetic motor oil specifically designed for vehicles with over 75,000 miles. It's engineered to reduce power-robbing leaks, burns, and deposits, but also contains a patented additive to protect the emissions system. Our phosphorus replacement technology reduces harmful phosphorus to protect the catalytic converter and extend peak performance. It's the natural choice for drivers who demand maximum performance from their high-mileage vehicle. Phosphorus replacement technology to help extend emissions system life Reduces leaks, oil burns, and power-robbing deposits. 15,000 miles between oil changes*
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