The problem with FT cam/lifter failures over the last 25 yrs has nothing to do with oil, & everything due to poor quality lifters. Soft [ Chinese ] metal & incorrect radius, or no radius, on the lifter face. We know this in this country because for DECADES, we have re-surfaced FT lifters due to the high cost of new ones. When done properly, they are as good as new & can be re-faced 2-3 times if not severely worn. We know about the problems because the people re-surfacing the lifters were finding soft metal, wrong or incorrect radiusing on new lifters. Not the oil, but the oil companies saw a marketing opportunity & went for it....
For the last 20+ years, I have been grinding a groove down the side of the lifter, from the oil band to within about 1/8" of the base. The lobe/lifter gets a positive oil supply & is no longer reliant on splash. I use a Dremel with a cut off wheel, go about 0.015". Takes 15-20 min to do 16 lifters. Is it really necessary? I don't think it is because of all the oil flying around, but I sleep easier knowing I don't need to worry about lifters/lobes failing from lack of oil.