This is the "Apex Predator" of the Mammoth grease lineup. When you’re operating on the West Coast, you’re often fighting three things at once: extreme cold, saltwater corrosion, and massive impact loads. Mammoth stocks the FS XD5 because it combines a Full-Synthetic base with Calcium Sulfonate and a heavy 5% Moly hit. It’s the "no-compromise" solution for high-stakes mining and marine equipment where a single bearing failure can cost thousands in downtime.

Phillips 66® Omniguard FS XD5 is a premium, high-performance, full-synthetic, heavy-duty, extreme-pressure (EP) calcium sulfonate grease containing 5% Molybdenum Disulfide (Moly). It is specifically developed for use in industrial and off-road equipment operating under severe conditions, including extreme temperatures and high-impact loading. Manufactured with a high-quality synthetic base oil and a non-soap, calcium sulfonate thickener, it is fortified with 5% Moly to provide an extra margin of protection against galling and wear under boundary lubrication conditions. It features a high dropping point, excellent mechanical stability, and is highly resistant to water washout. It provides superior protection against rust and corrosion, even in saltwater environments, making it ideal for the most demanding mining, construction, and marine applications.