Mag 1 High Mileage Synthetic Blend is formulated for engines with more than 75,000 miles - the wear-protection level steps up over conventional oil and the seal conditioner package helps slow the slow drip that older engines develop at the valve cover and crank seals. The FMX additive system holds film thickness under heavy load and warm-climate temperatures while still flowing cleanly on cold starts.

• Synthetic blend formulated for engines over 75,000 miles
• Seal conditioners help reduce leaks past worn valve seals and gaskets
• FMX additive package for oxidation stability under heavy load, high temperature, and cold starts
• Holds high-temperature film thickness to protect bearings under load
• SAE 10W-40 viscosity grade - high-mileage and warmer-climate viscosity - the heavier weight helps maintain oil pressure in worn engines and is commonly specified for motorcycles and older domestic engines
• Container: Qt - single-quart bottle for top-offs between changes or topping up after a small leak
• Meets ILSAC GF-5 and API SN service categories

Tip: Always check your owner's manual for the manufacturer's recommended viscosity grade. Switching to a high-mileage formula in an older engine can slow seal leaks, but do not increase viscosity beyond what the manual specifies - thicker oil reduces flow to top-end bearings and timing components.