I wasn't and still not debating weather it is good or bad advice. Only that this advice is not uncommon, and seems to come from several different service, transmission repair, and other sources. Not just localized to my location, but through out the country.

It had to come from somewhere originally, and if it was unfounded, it would seem it would die off. But for the advice I got in 1988 to be still given in 2010, there must be something to it.