There is a lot of confusion about this subject. However, although many Detroit Diesel service techs are not aware of this exception to their general rules, the short answer is that multi-vis Delvac 1 oil performs very well in Detroit Diesel 92 series engines. If you are not comfortable using multi-vis oil, you should consider using Detroit's private label SAE40 synthetic, available through Detroit distributors.
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Hopefully this helps.
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