The problem may be the result of the old oil not all being removed prior to putting in the new oil. This could be caused by the dealer not allowing enough time for the oil to drain back into the crankcase prior to draining, or by a failure to remove all the old oil using the suction method. When the new oil is added, in the correctly specified amount, it adds to any old oil left in the crankcase and will show as overfilled.

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Tom H.