Just wondering if I want to add ATF to my 300SD, what type is recommended? I've read that the new ATF doesn't lubricate as well as the old stuff, so I found some old stuff "Type F" that states its for '78 and older model vehicles...would this be better? And also, is the 2-cycle oil just as good or better for lubrication? I know alot of people say just out diesel fuel additive in, but all the additives say "ULSD compatible" which leads me to believe it was manufactured w/ emissions in mind not necessarily maximum lubrication.....I care more about my injection pump and vehicle performance.....Any input?