Wow. Running some 5-40 in my truck rightnow. With the larger capacity purolator filter. Unreal difference. Can wind way past 3500 without much vibrations......well in comparison to before. I'd say a solid %50 difference in feel.....just like butter. Plus I actually have an active oil pressure. Hmmm. Additive package is suppose to be strong also since it's for diesel engines. At idle it quiets it her down a shade but it's negligible. I think I just found my new 'go to' oil.
