First as of now Brad Penn didn't have their new 15w40 out yet so I mixed equally some 10w30 and 20w50 to achieve 15w40. This was done after consulting with Brad Penn.
Prior to the mix I had sent a sample of virgin 20w50 to Peterson Cat labs. Then I mixed the above numbers and put the 15w40 mix into the car running it 100 miles. So yes the 15w40 is not real virgin but for the purpose of this test, I was only really after the zinc and Phos numbers. This mix went to both Blackstone and Polaris.
Here's the numbers
..................... Zinc - Phos - Sodium ----Miles on oil
Peterson Cat (20w50)---1049----952----339---------0
Blackstone (15w40)-----1107----938----319-------100
Polaris (15w40)--------1600---1226----388-------100
Both Blackstone commented on how high the Sodium level is pointing to either it is because it's a newly rebuilt engine or it's an additive. Note that Peterson had similar numbers and that oil was virgin. So I am pointing to an additive.
But what got me is Polaris's high zinc and phos's numbers.
Prior to the mix I had sent a sample of virgin 20w50 to Peterson Cat labs. Then I mixed the above numbers and put the 15w40 mix into the car running it 100 miles. So yes the 15w40 is not real virgin but for the purpose of this test, I was only really after the zinc and Phos numbers. This mix went to both Blackstone and Polaris.
Here's the numbers
..................... Zinc - Phos - Sodium ----Miles on oil
Peterson Cat (20w50)---1049----952----339---------0
Blackstone (15w40)-----1107----938----319-------100
Polaris (15w40)--------1600---1226----388-------100
Both Blackstone commented on how high the Sodium level is pointing to either it is because it's a newly rebuilt engine or it's an additive. Note that Peterson had similar numbers and that oil was virgin. So I am pointing to an additive.
But what got me is Polaris's high zinc and phos's numbers.