In my 6.0L, I've used HDEO for the majority of the oil changes and it has never had an oil consumption problem. At 120k miles I'm using 1/2 qt between 8k changes; I consider that normal. My theory is that the extra detergents and soot emulsifiers help prevent rings from sticking, especially in...
I have had this ATF in the '99 Land Cruiser for the last 15,000 miles. 229k miles on the original A343F specifying Dexron II. I selected this fluid because it meets DII and the much higher spec TES-295. This fluid has been proven to be perfectly serviceable thus far.