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818 10/27/2002 9:28:31 AM 10/27/2002 John Clark jvclark02-nospam-@cs.com Engine Preference??? My vote is for the DD Series 60 hands down. The 8V92 is no longer available for highway use (circa early 90's) and parts and service are fast becoming an issue. The Series 60 is a much cleaner engine, provides better mileage, and developes higher torque at lower RPM's. Average TBO (time before overhaul) is 750,000 to 1 million miles for a series 60 versus 350,000 for an 8v92. I own an 8V92, and thoroughly enjoy it, but plan to upgrade when TBO is reached. FWIW, I think the ultimate combination is the Series 60 or Cat C12, teamed with an Allison six speed World transmission.