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Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

Castrol GTX Ultraclean 5W-30 Synthetic Blend Motor Oil, 1 Quart, Pack of 6 : Everything Else

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Castrol EDGE Extended Performance 0W-20 Advanced Full Synthetic Motor Oil: 5 Qt 15B58F - Advance Auto Parts

CASTROL 1 Quart 5W-30 Motor Oil, Advanced Protection

Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart, Pack of 6 : Automotive

Castrol Edge Extended Performance 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts, Pack of 3 : Automotive

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Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

As vehicles age, they change and some of these changes can result in costly repairs or replacement. Catalytic converter failure is one of the most common - and costliest - problems faced by higher mileage vehicles. The phosphorus in all motor oil anti-wear packages is also an industry recognized catalyst poison.

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Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil, 5 Quarts, Pack of 3 : Automotive