PLEASE ANSWER CASTROL QUESTION?

[Ron]

Hi,I posted a Blackstone UOA of Castrol 5w-50 ,and
it reads good.Now,I'm trying Delvac-1 5w-40,and hope to compare UOA numbers after 5-6k miles. ('99 Ford E-150 van,4.2L six)
Ron

 

[Oilmeup]

Well, we will see what happens. I may not like the way Castrol has done things in the past, but I have always liked their oils. I'll do a sample at 3,000