This is the first UOA I've done on my truck using Polaris Labs. It came out pretty good as they usually do. In the past, I had some coolant getting into my oil from a leaking water pump dripping on a leaky pan gasket but that seems to be better. The engine has about 420,200 miles and the oil had about 10,300 miles. I used Service Pro 15w-40 with 2 quarts of Hot Shot's Secret which is where the Moly came from. The previous oil change, I used Schaeffer's 7000 with some of their Moly EP additive which is where I think the antimony came from.
Iron 32
Chrome 1
Ni 1
Al 2
Cop 8
Sil 5
Sod 3
Pot 5
Moly 45
Ant 19
Bor 25
Mag 913
Cal 1478
Phos 1031
Zn 1221
Soot Water Vis100c13.4
TBN 5.83
Ox 13
Nit 18
Even though it runs and starts good, I did a compression test a few weeks ago trying to figure out why my blowby and oil usage both seem high and my numbers were a little low, around 300 psi at each cylinder, so I was a little surprised that the nitration number wasn't higher. I used Delo 10w-30 this oil change because I've read here how well that grade works in HEUI engines and so far seems to be working real well. I used the Delo because we had a couple gallons around so I only needed a little for the oil change. If I use all the Delo up, I may switch to a Kendall 10w-30 I can get for a little less.
Iron 32
Chrome 1
Ni 1
Al 2
Cop 8
Sil 5
Sod 3
Pot 5
Moly 45
Ant 19
Bor 25
Mag 913
Cal 1478
Phos 1031
Zn 1221
Soot Water Vis100c13.4
TBN 5.83
Ox 13
Nit 18
Even though it runs and starts good, I did a compression test a few weeks ago trying to figure out why my blowby and oil usage both seem high and my numbers were a little low, around 300 psi at each cylinder, so I was a little surprised that the nitration number wasn't higher. I used Delo 10w-30 this oil change because I've read here how well that grade works in HEUI engines and so far seems to be working real well. I used the Delo because we had a couple gallons around so I only needed a little for the oil change. If I use all the Delo up, I may switch to a Kendall 10w-30 I can get for a little less.