Is this oil good for my sr20det? It says it's for heavy duty Diesel engines but from what I could find on fourms most people say to run 10w-40 or 15w-40 :
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Two Cases of Shell Rotella T5 Synthetic Blend 10W40 Heavy Duty Diesel Engine Oil | April Lubricants, Coolants, Industrial Fluids and Related Products | K-BID