Thanks Tom, I have to tow a Class B motorhome (Sprinter MB Cruiser) used as a mobile office. I have a Beaver Patriot Thunder with the 455 cat C-12. My mileage is 8 to 8.5. I am shopping for a Newell. Could you tell me what year they went to the Series 60 and what the difference in performance and mileage might be versus the 8v92.
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