That’s a heck of a lot of Moly B. What’s going on here?
Most likely assembly lubeThat’s a heck of a lot of Moly B. What’s going on here?
^^This. Valvoline synth has triple digit moly.Valvoline has been loading up most of their lubes with moly in the add pack in recent years.
Most likely assembly lube
That’s an awful lot. I know that Motorcraft oil has used a pretty high dose but, not that much.Valvoline has been loading up most of their lubes with moly in the add pack in recent years.
Wow! I had no idea that Valvoline was putting that amount in. I need to check on their 5W30.
266 is actually a bit low.
Looks like it had an oil change at around 1100 miles, so this is the 2nd OC UOA.Most likely assembly lube
That's interesting, i hadn't thought of the sulfur requirements...but the 2 types of Moly don't have a different amount of sulfur associated with them.Valvoline is most likely using MoDTC dimer. MoDTC trimer is more sulfur rich relative to moly concentration in raw form, which is part of why it's more effective at creating MoS2 at lower concentrations, but this also means it pushes the API SP limit for sulfur. (0.5% max) If they had MoDTC trimer at that concentration, given the other sulfur-containing additives in the formula, I wouldn't see them being able to stay under the API SP limit for sulfur.
That's interesting, i hadn't thought of the sulfur requirements...but the 2 types of Moly don't have a different amount of sulfur associated with them.
The trimer is more effective at lower dose, so it does allow the formulator to reduce sulfur overall.
Here is a pretty interesting paper that mentions that aspect, but some other interesting topics:
The Effect of Additive Chemical Structure on the Tribofilms Derived from Varying Molybdenum-Sulfur Chemistries - Tribology Letters
Molybdenum disulfide (MoS2) is an effective friction modifier that can be formed on surfaces from oil-soluble lubricant additives. Different additive chemistries can be used to form MoS2 on a surface. The tribofilms formed from three different molybdenum additives (MoDTC Dimer, MoDTC Trimer, and...link.springer.com
I will note that adding moly, of the 3 types discussed, to a fully formulated oil (already containing moly) reduced friction coefficient.
BTW Valvoline wont tell you which moly is in this, I've asked. So, we can't conclude one way or another.
Interesting... the 5W30 Modern Engine Oil I've been using has shown much less Moly in my Infiniti Q60 UOAs:All recent VOA's of Valvoline show roughly 300ppm of Moly.
Interesting... the 5W30 Modern Engine Oil I've been using has shown much less Moly in my Infiniti Q60 UOAs:
View attachment 102029
Almost scary how consistent the concentrations of Moly are in all the samples.
Last time Valvoline showed the Noack numbers (before they went started showing <15% Noack for everyting) the Valvoline Advanced (previously called SynPower) was less than 10% Noack.I blame this mostly on the use of low viscosity group II+ base oils in their formulas, which is also likely why it has a higher Noack than some others of the same grade.
The modern engine Valvoline was before...it didn't have much moly and was discontinued. All recent VOA's of Valvoline's current lineup of Advanced Synthetic and Extended Protection have moly in the 300ppm range.Interesting... the 5W30 Modern Engine Oil I've been using has shown much less Moly in my Infiniti Q60 UOAs:
View attachment 102029
Almost scary how consistent the concentrations of Moly are in all the samples.