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non lab analysis of my new oil

Non technical analysis

( probably Not safe for techies )

Changed to Mobil 10w60 extended life Motorsport oil.

About 1500 miles into this oil (halfway ish for me, I change regularly, oil! Is cheap, I only do 8k per year anyway).

Noticeable difference in sound, noisy when cold, first minute or so, almost silent when warm, smoother than ever.

Low down pull has improved, feels like its been tuned a bit, but nothing changed other than oil.

My standing still oil temp worries (after high speed motorway runs straight into standing traffic) have almost completely gone.

Temp wise, it takes a lot longer for the engine to show any signs of anything other than normal (oil and water ) with this oil, maybe an extra 20 mins of traffic jam on a hot day before the oil hits 98 \ 100, but, the engine stays hot for a long time one there.

Went to oulton park and did a track day last week, mild cold day but not freezing,

oil temps where fine, lower than previous oils on track days by around 5 - 10 deg c,

although again, once it was hot a slows paced lap didn't cool it much at all, its as if the thicker oil is more deeply heated ( I did say this was a non tech analysis).

Having looked at bits of video, I can see that I was using 6400 in 2nd and 3rd quite often, which I limited on previous track day outings (6000) to keep temps down a bit, so that's progress.

Consumption wise, just topped up by 200ml, now at 2100 miles in, two green lights out on my dash.

Did not need to top up once on the track day.

I like this oil :)

Was using fuchs silklolene pro s 10/40 Before
 

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Jamie

Glad you liike the Mobil 10w60. I plan to use this next on my E30 M3 (non cat) and I will see if a draw similar conclusions. Always good to hear of ways to help the car run a little cooler. If oil temp is often an issue for you it may be worth checking the oil cooler lines get properly hot. On my 3.8 one is red hot (cant touch for more than 1 second) and the return is warm but considerably cooler. My 3.8 gets to quite a high oil temp when pushed (about 220 iirc) but then quickly cools back to 210 even on continued spirited driving. I take these facts to mean my oil cooler is working OK, if you havent checked then it may be worth looking at yours.

I often wonder if theres a phsycological effect with new oil as my cars invariably feel smoother after a change (I just went from Castrol 10w60 to Fuchs 5w40 on a Z M Coupe S50, and that felt considerably smoother and easier to crank).

All the best.
 

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Hi Matt,

It definitely now sits at 95 -98 when really hot, including sustained illegal but not stupid motorway speeds.
Before it would be 98 to 105....

When it first gets really hot on track, it will go up to 103 / 105 and then drop to 98 and stay there no matter what, so I think the oil stat is working, and that there is some flow through the oil rad, but, I have long suspect that my oil radiator is slightly clogged up internally, when funds and time allow it will be replaced or cleaned out (the cost is more the laboutime of taking it off and refiting).
 

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Sorry to go a bit off topic - I'll make this the last one.

Jamie - cleaning out the oil rad isnt a massive job. next time your car visits an expert my advice would be to add on an oil change, coolant change and oil rad blast - as there are economies of scale in those jobs. Shouldnt cost more than 3-4 tanks of fuel.
 

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two track days on Mobile 10-60w.

and several thousand KM's road use.

second batch of this oil installed, (one per track day), and it still isn't using oil.... i had to top up by 200 ml max just before the last oil change, which given the high rpms and long motorway runs is not much at all.

highly recommend this oil.
 

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Discussion Starter #69 (Edited)
Edit Post:

You are correct.

I totally missed reading the very top of the sample. My eye went mediately to the zddp number. I think the zddp of this particularly oil is a bit low.
 

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It is a virgin sample.

My thoughts, a little low on zinc and very light on molybdenum.

Dubious about 10w-60.

Considering Mobil 1 5W-50 or Castrol Syntec 5W-50 next time around.

In the winter temps (40-60F) I have been running Mobil 1 10-40 HM. Looks like it's going to be 70-90F+ until at least autumn.
 

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Hi guys,
My M88 has his oil changed today.
nearly 2 years old and about 4000 km/ absolutely no adding during this period.
then I'll send 2 samples to the LAB:
One of the used oil and another one of the virgin MOTUL LE MANS 15W50.

ASAP the analysis report...

wait and see...
:3:

PS: i don't remember how many ml of oil do they need to do the analysis ?:typing:
 

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Discussion Starter #73
MOTUL LE MANS 15W50
This is a great choice of oil you have picked for your M88/3. Motul is great if not the leader of most oils, specially Le Mans series.

It will be interesting to see after 2 years how the oil is aged. 15W50 is great choice of viscosity for the M88/3

Please report back after the lab test.

Regards
Anri
 

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Discussion Starter #74
It is a virgin sample.

My thoughts, a little low on zinc and very light on molybdenum.

Dubious about 10w-60.

Considering Mobil 1 5W-50 or Castrol Syntec 5W-50 next time around.

In the winter temps (40-60F) I have been running Mobil 1 10-40 HM. Looks like it's going to be 70-90F+ until at least autumn.
5W-50 is a bit too thin. Personally I don't like the first number of viscosity less than 10-15W.

Brad Penn oil is a great choice and rich on Zddp Welcome! pick the 15W-40 and its yearly choice viscosity.

On one of my daily driver M6's I use 15W-40 for Diesel engines with half bottle of zddp to make it around 1300ppm. All diesel oils at least most have very strong detergent as this is very important for diesel engine since the diesel engines and fuel is very dirty.

Regards
Anri
 

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This is a great choice of oil you have picked for your M88/3. Motul is great if not the leader of most oils, specially Le Mans series.

It will be interesting to see after 2 years how the oil is aged. 15W50 is great choice of viscosity for the M88/3

Please report back after the lab test.

Regards
Anri
Don't wory Anri ,
I will.
My ///M6 use this oil since I bought it in 2001.
I've made since that time more or less 40000km and no troubles at all. This is (IMHO) the best oil for S14 and M88 engines.

As we talked , earlier on this tread with Raymond fantastic explanation about oils and ///M engines
my aim is: do this oil can also fit " as a glove" to the S38B38...
Actually my S38 have MOBIL 1 10W60, I'd like to compare theses 2 oils...;)

EDIT: PS: Anri your ///M1 is bloody hell nothing else than TERRIFIC...
Here in Europe it could be priced up to 300k€ !!!!
 

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IMHO,
not the best oil for S38...
second number is too low... but wait for the answers of the "oil specialists"....:cool:

where do you live ???
 

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Used this today, am I completely screwed?
There are two aspects to consider;

1: HTHS
2: ZDDP

Although a 5W40 grade has its merits, it is in essence a SAE 5W baseoil that has been made temperature stable using polymer additives. This flattens the temperature curve making a single grade oil (that has a Newtonian temperature curve) into a multi-grade oil.

The problem lies in the fact that the original factory requirement for an M88/S38 was 15W40. Now, from a layman's point of view, a 5W40 is better. To some extent (low temperature performance) that is true, but SAE specifies different requirements for HTHS for 15W40 and 10W40 and below. HTHS requirement for a 5W40 grade is 3,5cp and 3,7cp for 15W40. With a high-revving engine design that is capable of a piston speed of 20m/sec, I would advice against going below the minimum (differentiated) requirement of 3,7cp to prevent metal-to metal contact in the bearing area!

That does not mean that there aren't engine oils that are capable of doing so, for example, Mobil1 specifies for its new Life 0W40 a HTHS of 3,8cp and a P-value of 1000ppm (element of ZDDP). This would make a fine performer for Nordic conditions.

Furthermore, the M88/S38/S14 operate their cams in boundary mode lubrication. That means that the viscosity will break-down under high pressure, even when HTHS >>3,7cp. This is a general problem that has only been solved with the introduction of roller-guide cam-followers in the late 1990's. During boundary mode lubrication, metal-to metal contact will occur, eventually resulting in damage to the cam-lobes. This is a problem that has been around since the 1950's and as a solution, oil manufacturers added ZDDP, a chain of zinc and fosfor elements. This forms an expendable zinc film on metallic parts that protects the underlying metal.

Oil manufacturers were forced to reduce teh active compound of ZDDP because of environmental concerns about a decade ago. ZDDP won't last forever as it depletes so you have to compensate for that by lowering the service interval. With P-values as low as 800ppm (were Castrol typically resides for their generic engine oils), I advice against oil intervals of more then 4000km to 5000km (max).

Mobil1 Extended Life 10W60 has a P-value of 1300ppm, effectivekly doubling the usefull life of an engine-oil fill.

Furthermore, the polymer additives break-down. This results into lowering of the viscosity at operating temperature (and thus also HTHS) down to its basic viscoty rating, in your case SAE5W (in the case of very-long oil exchange intervals). But noticeable already during a normal service life, and actually observed by a reduction of oil-pressure by a fellow BMW enthusiast iin Belgium.

I won't say that you are screwed, but check the datasheet of the product to eliminate these concerns. If these parameters are not specified, you can ask them from the Castrol technical helpdesk. When not disclosed, I would ditch this oil ASAP and move towards suitable (high ZDDP and high HTHS) oil for example.

- Mobil1 Extended Life 10W60
- Motul LeMans 300V competition 15W50
- Brad Penn high performance 15W40 or 20W50
- Mobil1 New Life 0W40 (for NORDIC environments)
 
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