[BR3W CITY]

Not running one either. Heat in the oil radiates into the rest of the engine, so the regular cooling system will handle its heat load normally. Oil coolers usually are more useful in FI apps where your artificially generating more heat that would be there, or in an industrial engine that runs in place all day and doesn't have an air-cooling system. (for reference, they'll use fluid pumps through resevoirs and oil coolers as needed)