At Quaker State, oil isn"t just tested before it goes in the bottle, but after it is gone through thousands of miles of real-world torture. Used Quaker State Advanced Durability still passes these critical tests for brand-new oil, even when it is ready to be replaced. Quaker State Advanced Durability motor oil minimizes friction-related wear 3 times better than the wear standard set by top American and Japanese automotive manufacturers, and meets or exceeds the latest oil standards for protection under high temperature and severe service conditions.