Thanks for posting this as it confirms for the hundreth time that Na is an additive. XOM told me this as well so it's no surprise. George, where are you?
Drew,,,, i agree this Mobil oil has the weakest additive package of any oil i have looked at on this site. I am no expert but i would not use this stuff in my lawnmower.
This is more like it. Blackstone must be having problems again. This concerns me since I just shipped them a sample of my 2.4L Accord's Mobil Clean 7500.
Something deffentely wrong with VOA and or UOA results. Numbers all over the place from many UOA & VOAs. I planned on using this oil in the future but, will wait until it get sorted out with many data points that agree. JMO
When you say the add pack is weak are you looking at all of the numbers? This oil has quite a bit of Sodium and Boron. I don't know exactly what Sodium and Boron do, but you cant just look at the amount of Zinc and Calcium and say the add pack is weak. You need to look at the complete picture.