Problem of anti-freeze in the oil

This may have had bad intake gaskets which may have lead to antifreeze in the oil. That gasket problem has been solved so just change your oil at least 3 times a year along with a filter and keep our air filter clean like once a year unless you live in a dusty area then twice a year. A dusty area would be a gravel/sand road even if only two blocks long. Use a good quality oil or synthetic if you want to go with the cost. You should do okay then.