Stupid question about radiator...

[PKRWUD]

For a 5.0 street driven daily driver, the optimum operating temp is between 200 and 210 degrees. This is where the engine is the most efficient, and makes the most out of what it's got. It's also where the ECM was programmed to aim for as a normal operating temp. When you run colder than that, you create several problems. The ECM is delayed in going into closed loop, which results in a rich mixture. A rich mixture will clog your cats and thin out your oil, damaging your bearings, and washing the cylinder walls, reducing the rings ability to seal, and lowering your compression. The oil is too cold as well. It flows it's best when the engine temp is around 210. At 145, for example, it's more like syrup than like the oil that is supposed to protect the engine. If a turbo or a blower that has an oil line plumbed from the engine is installed, you're just begging to ruin it's bearings very prematurely.

Take care,
~Chris