Final answer:
The engine operating limit for oil temperature at maximum continuous is not specified but is essential for preventing overheating and maintaining engine efficiency. The efficiency of an engine, like the Carnot engine, is influenced by the temperatures of the hot and cold reservoirs. Practical limits on temperatures ensure that engines operate within safe and efficient parameters.
Step-by-step explanation:
The engine operating limit for oil temperature at maximum continuous performance is a key parameter in engine design and directly relates to the efficiency of the engine. While the question does not specify a specific number, examples from thermal dynamics can help us understand that an automotive engine's efficiency is indeed limited by temperatures that can lead to overheating. Considering a heat engine like the Carnot engine, which represents an idealized form of a real heat engine, the efficiency is determined by the temperatures of the hot and cold reservoirs.
For instance, an engine operating with 450°C steam exhausted at 270°C would have a maximum efficiency calculated based on these temperatures. If the hot reservoir temperature needs to be calculated for an engine with 30% efficiency and a cold reservoir temperature of 200°C, we use the formula for the Carnot efficiency. Moreover, practical limits to the efficiency of car gasoline engines are implied by the maximum possible efficiencies observed.