A dealer can print out a report from the E-Tec engine computer that includes tons of info, such as: engine hours, no. of start cycles, max rpm, max temp of both heads, max EMM (Engine Management Module, the engine computer) temperature, no-oil time, stored engine faults, persistent engine faults, engine rpm profile (time@rpm, in 500 rpm increments), engine temperature profile of each head, EMM temperature profile and oil setting (if it's set to run full synthetic XD-100 oil, where it will use less oil than if set for conventional TCW-3 oil). Will give you a good snapshot of any problems the engine's had and how hard it's been run, as well as whether or not it was propped right. Nice to know all that stuff if you're buying a used motor!
OPTIMUM WOT rpm for that motor is 5500-5600. If you want maximum performance and engine life, run XD-100 oil and ignore the "Recommended WOT Operating Range" of 4850-5850 rpm that many uneducated dealers seem to think is acceptable!
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