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Introducing Rotella Engine Oil 15W-40 Conventional, specially formulated for heavy-duty trucking, off-road, and commercial applications that require excellent wear protection and engine cleanliness. This conventional oil delivers unbeatable performance in extreme temperatures, from frigid cold to scorching heat, ensuring smooth operations even in the harshest environments. Made in the USA, this 55-gallon drum provides exceptional value for fleet owners and heavy equipment operators seeking reliable protection for their engines. It meets API CJ-4 specifications and provides exceptional oxidation stability to keep your engine running like new. Upgrade to Rotella Engine Oil 15W-40 Conventional and experience the ultimate in reliability, performance, and longevity.