Thank's for the response. Is the private label synthetic available at a Detroit Diesel distributor the product manufactured by Mobil, or is it something other? And if you have considerable experience with multi-vis Delvac 1, which vis were you recommending in your coaches? I am only so far able to find 5W-40. Would you recommend this vis for a Series 92? I live in Florida, and I must admit, 95% of my operations are in warm to hot climates.
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