Gentlemen, I have access to the used Chevron 15w 40 which came out of the Caterpiller diesel generator at work. Oil has about 9 hours on it and is 1 year old. Still clear but not as clear as new oil. Generator takes 110 gallons of oil per change. I was thinking of using the oil in my beloved 1985 300SD with 160,000 miles. What is your opinion?? It seems like a real waste to let the recyclers have it when it looks and smells almost like new oil.

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Orland Park, IL
1985 300SD 215,000 miles