Mobil 1 10w40 HM

[SonofJoe]

Originally Posted By: 4WD
Just used Mobil 1 HM in 10w30 - it is SL A3/B3

I also use regular 10w30 Mobil 1 - GL5 and A1/B1



If you have the choice between Mobil 1 HM as a 10W30 & 10W40 and they're both labelled as being full synthetic and are the same price, then go for the 10W30. Less VII, lower Noack and a modicum of fuel economy make 10W30 the logical choice.

 

[Quattro Pete]

Comparison of M1 HM 10w-40 against Castrol Edge HM 10w-40.

Granted, different labs were used, so it's not exactly apples to apples comparison...

Code:


Element M1 HM 10W-40 Edge HM 10W-40

--------------- ------------ --------------

Aluminum / 0 2.8

Chromium / 0 0.1

Iron / 0 1.2

Copper / 0 0.0

Lead / 0 0.0

Tin / 0 0.0

Molybdenum / 69 75

Nickel / 0 0.5

Manganese / 0 0.1

Silver / 0 0.0

Titanium / 0 14

Potassium / 0 2.2

Boron / 85 370

Silicon / 7 5.4

Sodium / 5 2.8

Calcium / 958 3097

Magnesium / 680 10

Phosphorus / 794 700

Zinc / 914 738

Barium / 0 0.0

SUS Visc @ 40C / - 91.52

cSt Visc @ 100C / 14.96 14.6

Visc Index / - 166

Flashpoint in F / 440 -

Fuel% / - -

Antifreeze% / - -

Water% / 0.0
Insolubles% / 0.0 NEG



TBN (mg/KOH/g) - 10.0

TAN (mg/KOH/g) - 1.62

 

[4WD]

So it could just be for supply chain reasons ?

 

[4WD]

Thanks - They sell both but running 10w30 - that engine is tight - just starting to oil stain more around rear seal (does not drip). GM small blocks tend to do that over time ...

 

[KCJeep]

...