@vominator been there done that, the 4.0 in my Comanche had such a bad oil leak for a while that I ran it out of oil at least a dozen times at highway speeds, 235k on the motor and it didn't even care. Great oil pressure, no bad noises, it still runs great.
cameraman... shut the hell up, you have no idea what you are talking about. Doesn't matter if the exhaust goes underwater as long as the motor keeps running. Those trucks clearly had decent snorkels installed but probably could have used better ones...
The only way to really stop this from happening is to stop oil flow (going to kill the turbo or the motor probably) or to stop air flow (good luck! I suggest a very large, very strong board or steel plate across the intake)
world's most retarded poser truck