WHY MAMMOTH TRUSTS THIS PRODUCT

In the Pacific Northwest, many of our high-performance radial and opposed-piston operators prefer the consistent, heavy-duty "cushion" of a single-grade oil. We recommend PHILLIPS 66® VICTORY® because it delivers that classic SAE 50 (Grade 100) or SAE 60 (Grade 120) protection while eliminating the need for aftermarket additives. It’s the Gold Standard for engines requiring the Lycoming LW-16702 anti-wear chemistry. We trust it because it keeps your internal steel shielded from scuffing during high-load operations, ensuring your engine remains factory-clean and ready to hit the skies.