Quote:
Originally Posted by BeSmart
Hi Gusfraga and Donald, I'm not sure, but I think smart recommends a break-in period in engine breaking. Not sure what it is. The owner's manual should have some comment on this. 
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For first 500 miles, engine rpms should not exceed 4000 rpm or 2/3rds of max rpm. IF you don't have a tach, you'll have to use some judgement by the sound of the engine. There is no break in period for engine breaking as such....don't understand your wording there....the limiting factor is RPM whether engine braking or accelerating.
John