Esso XD3 0w30

[olympic]

My lab finally updated it's database to include the new synthetic formulation of XD3 so I thought I'd post the numbers.

Tin 0
Lead 0
Copper 0
Aluminum 1
Silicon 3
Iron 5
Chromium 0.4
Silver 0
Zinc 1350
Magnesium 10
Nickel 0
Barium 0
Sodium 1
Calcium 3800
Vanadium 0
Phosphorus 1300
Molybdenum 0
Boron 3
Manganese 1
Viscosity 12.07

TBN wasn't listed but it's believed to be 12+.

 

[Brikhead]

Is it me, or is that a whole lot of zinc?? What purpose does it serve?

 

[bruce381]

No not really, adds to oxidation stability, anti wear, corrosion protection.
bruce

 

[BlazerLT]

Wow!

Look at that additive pack!

That's it, this stuff is going in my Blazer for a whole year.

 

[Blue99]

Well, let's filter out the trace elements that are not relevant to the add pack.

Zinc ............1350
Phosphorous 1300
Calcium .......3800
Magnesium......10
Silicon..............3
Boron...............3

So, it looks like a high detergent, CI-4 rated oil with a 1.5 sulfated ash level.

Moly & Boron are not significant players in this formulation - the synthetic base oils are a key

 

[sky jumper]

but why 5ppm iron in the virgin oil?

 

[olympic]

Iron in a VOA is likely leached off of the pipes and equipment used to manufacure the oil. It's not harmful but useful to know when interpreting a UOA.