2008 BMW M3, BMW TwinPower Turbo 10W-60, 5953 mi

[d00df00d]

Previous UOA here.

154112 miles on the engine at the time of this sample.

One HPDE right at the beginning of the OCI. Nothing else worth noting, as far as I remember.


Wear Metals

Iron - 5
Chromium - 0
Nickel - 0
Aluminum - 4
Copper - 2
Lead - 0
Tin - 1
Cadmium - 0
Silver - 0
Vanadium - 0

Particle Quantifier (PQ) Index - 12


Contaminant Metals

Silicon - 5
Sodium - 2
Potassium - 0


Multi-Source Metals

Titanium - 41
Molybdenum - 166
Antimony - 0
Manganese - 0
Lithium - 0
Boron - 27


Additive Metals

Magnesium - 20
Calcium - 2534
Barium - 0
Phosphorus - 743
Zinc - 883


Other Contaminants

Fuel Dilution - 1.9% (GC)
Soot - Water -

Fluid Properties

Viscosity @ 100º C - 19.6 cSt
TBN - 4.79
Oxidation - 14
Nitration - 11

 

[chris719]

Didn’t realize this oil had that much moly. Atypical for modern Castrol. Looks good though.

 

[BMWTurboDzl]

Previous UOA here.

154112 miles on the engine at the time of this sample.

One HPDE right at the beginning of the OCI. Nothing else worth noting, as far as I remember.


Wear Metals

Iron - 5
Chromium - 0
Nickel - 0
Aluminum - 4
Copper - 2
Lead - 0
Tin - 1
Cadmium - 0
Silver - 0
Vanadium - 0

Particle Quantifier (PQ) Index - 12


Contaminant Metals

Silicon - 5
Sodium - 2
Potassium - 0


Multi-Source Metals

Titanium - 41
Molybdenum - 166
Antimony - 0
Manganese - 0
Lithium - 0
Boron - 27


Additive Metals

Magnesium - 20
Calcium - 2534
Barium - 0
Phosphorus - 743
Zinc - 883


Other Contaminants

Fuel Dilution - 1.9% (GC)
Soot - Water -

Fluid Properties

Viscosity @ 100º C - 19.6 cSt
TBN - 4.79
Oxidation - 14
Nitration - 11

3 liters of make up oil? Am I reading that correctly?

 

[d00df00d]

3 liters of make up oil? Am I reading that correctly?

Yep.

 

[BMWTurboDzl]

Yep.

I know consumption is higher than avg with the S65 but 3 liters seems like a lot of make up oil over 6k miles and 1 track day.

 

[fantastic]

Overall the wear looks good but note the added oil will dilute the oil a bit but still doesn't appear to be anything out of the ordinary other than perhaps some moderate oil consumption. 1 L per 2k is ok not great but ok. Surprised they marked the visc. since this is a 10w-60 oil. Titanium is put into some oils on the market but I don't think it's common.

 

[d00df00d]

Surprised they marked the visc. since this is a 10w-60 oil. Titanium is put into some oils on the market but I don't think it's common.

Pretty sure they're marking it because it's a grade low.

This engine has no Ti in it, so probably safe to say Ti is indeed an additive here..

 

[fantastic]

Pretty sure they're marking it because it's a grade low.

This engine has no Ti in it, so probably safe to say Ti is indeed an additive here..

Interesting, While I don't know much about 10w-60 oils the visc. being 19.6 is some darn thick oil & you should be well protected.

 

[chris719]

Interesting, While I don't know much about 10w-60 oils the visc. being 19.6 is some darn thick oil & you should be well protected.

Only unicorn tears could protect an S65 from itself .

 

[d00df00d]

Interesting, While I don't know much about 10w-60 oils the visc. being 19.6 is some darn thick oil & you should be well protected.

Can't blame you. 10W-60 isn't exactly a super-relevant spec!

This particular 10W-60 is especially niche; BMW only specs it for 3 engines, and it's literally the only oil they say is appropriate for those engines.

 

[fantastic]

Can't blame you. 10W-60 isn't exactly a super-relevant spec!

This particular 10W-60 is especially niche; BMW only specs it for 3 engines, and it's literally the only oil they say is appropriate for those engines.

That's great they came out with a solution to this engine's needs. Thanks for sharing

 

[d00df00d]

I know consumption is higher than avg with the S65 but 3 liters seems like a lot of make up oil over 6k miles and 1 track day.

Yep.

It came to me consuming 1 L every 1500-1800 mi, stabilizing on the higher end of that range as I drove it. Previous owner had apparently used a different 10W-60; I used the BMW stuff.

Immediately after I changed the valve cover gaskets, consumption decreased to 1 L / ~3000 mi. I did a lot of very easy highway driving on those OCIs, though, so that might have been a factor.

Either way, consumption has gradually increased since then until stabilizing around its current level. Over that time, a couple more oil leaks have been found and fixed, but those didn't seem to change things much. Right now it seems there are no significant leaks, nor am I getting any visible smoke from the tailpipes, so...