We suggest you contact your nearest Detroit Diesel distributor to purchase Detroit's private label straight weight synthetic. As we recall, Detroit recommends SAE40. While the "traditionalists" at Detroit Diesel do not agree, we repeat our prior comment: at Newell we like the performance of multi-vis Delvac 1 with Series 92 engines, based upon superior cold weather starting. We have considerable experience as well as oil analysis documentation to back up our recommendation, which we have shared with Detroit. But old habits are hard to break.
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