Is STP high mileage oil a synthetic blend?
William Rodriguez
Published Jan 06, 2026
STP Engine Oil High Mileage Full Synthetic 5W-30 5 Quart.
Is high mileage oil the same as synthetic blend?
High mileage oils are usually synthetic oils. They are typically based on either full-synthetic oil or a blend of synthetic and conventional oil.What is STP high mileage oil?
Product DescriptionSTP® High Mileage Oil Treatment + Stop Leak is excellent for cars, light trucks, and SUVs. This high-viscosity formula, complete with anti-wear agent ZDDP, is specially formulated to help fight metal-to-metal friction by providing a thick cushion between moving engine parts.