Jumbo X'Cool Crystal 10W40 is apremium quality motor oil designed for use in passenger cars, light trucks and sport utility vehicle under all operation conditions. It is formulated to provide excellent wear protection, to minimize engine sludge and varnish deposits at both high and low temperatures, and to resist viscosity and high temparature thermal breakdown even in severe condition. It also protect against rust, bearing corrosion and foaming. Jumbo X'Cool Crystal 10W40 suitable for use in turbocharged engines.