Flushing/internally cleaning an engine

[miket1]

Many years ago, my brother in law, who never changed oil, ever, had a 400 pontiac engine that he got all sludged up, i pulled the drain plug and it was and it was caked over so bad that no oil would run out, finally got it drained,added 4 qts. of 10w30 and 1 1/2 qts. diesel fuel, let it idle only, no driving, for over an hour,drained, ran new oil 1 week than we repeated the process once more,it cleaned out nicely and the new oil stayed clean, no problems.