Is an oil cooler necessary on a 350 Chevy?

An oil cooler isn't strictly *necessary* on a stock or mildly modified 350 Chevy engine, especially if it's not subjected to extreme conditions. However, it becomes increasingly beneficial, and even recommended, under these circumstances:

* High-performance applications: Engines with significant modifications (higher compression ratios, forced induction, nitrous oxide) generate substantially more heat. An oil cooler helps maintain optimal oil temperature, preventing oil breakdown and extending engine life.

* Towing or heavy hauling: Prolonged periods of heavy load increase engine temperatures, stressing the oil. An oil cooler helps mitigate this.

* Frequent stop-and-go driving in hot climates: In these conditions, the engine may not have sufficient time to cool down between cycles, leading to elevated oil temperatures.

* Racing: The intense heat generated during racing demands an oil cooler to maintain oil viscosity and prevent damage.

In short: For a stock 350 Chevy seeing normal street use, an oil cooler isn't a necessity. But for anything beyond that, it becomes a strong consideration to protect your investment and ensure optimal engine performance and longevity.