Everlast 960 Winter Grade offers superb internal valve protection in cold climates and is biodegradable. It has excellent dual resistance to water and petroleum products. Everlast 960 WG is formulated from Lubchem’s proprietary line of Lubeflex base oils. Lubeflex oils provide an insoluble lubricant coating of internal valve components which shields metal surfaces from harsh hydrocarbon environments while maintaining ease in pumpability in cold environments.