I use to read every article l could find on oils and engine longevity until I followed a long 6 mouth magazine series on oils. The whole time I time I was expecting them to decree some definitive " This is the best thing to do ", conclusion. What it came down to is while one oil might be a little better for one application and another might be a little better under different conditions, all in all it stated that," A modern day engine failure due to oil failure is extremely rare". I quit reading oil articles after that.