Castrol GTX High Mileage is now formulated with Phosphorous Replacement Technology™. This ground breaking technology helps to prevent emission system failure, reducing phosphorus and maintaining wear protection for vehicles with greater than 100,000 kilometers.
Catalytic converter failure is one of the most common – and costliest – problems faced by higher mileage vehicles. Phosphorus is an industry recognized catalyst poison. All motor oils contain phosphorus as part of the additive package to help prevent engine wear. Castrol GTX High Mileage’s advanced formula is specially formulated with less phosphorus than other leading high mileage and conventional oils; which helps prevent catalytic converter and emission system failure. Castrol GTX High Mileage contains a patented Phosphorus Replacement™ technology that provides unsurpassed protection against sludge, wear and oil burn-off.*