Castrol 03111 GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quart For cars with over 75,000 miles Helps prevent catalytic converter and emission system failure Superior dispersancy that fights sludge build-up Exceptional oil burn-off protection exceeding industry standards** ** Based on API and ACEA volatility specifications Seal conditioners to help reduce leaks Advanced additives to minimize engine wear Improved fuel economy API SN Castrol recommends the use of Bosch oil filters