[SnoEclipse]

I hate 'integrated' oil coolers that are buried in the radiator. Those things are a wrecked engine waiting to happen.

On top of the obvious problem of possible cross contamination between fluids, you are subjecting whichever fluid is cooler to the heat of the other fluid.

Say your engine coolant runs at 275 or so and you want your engine oil at 200. Now run all that through an 'integrated' cooler that shares fins and mounting space.

Aftermarket oil coolers (engine and tranny) as well as uprated hoses, thermostatic valves in the lines, etc, etc are relatively cheap. Work up the prices yourself and compare that to the rebuild costs of an engine and or tranny damaged by contaminated fluids.

Builders (usually) go all out with new engine seals and gaskets. Why not apply the same logic and discipline to the cooling systems?