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Oil Pressure - Liquid Moly 5W40 Leichtlauf High Tech
Sharing............
My engine oil has met its due date, 10 months albeit only 1,100KM.
I been a fan of Mobil 1 if for gasoline and will use FUCH if for marine diesel. The top class ones.
Since now I have an oil pressure gauge, I want to experiment with other MB229.5 oil.
I initially wanted FUCH, but could not get the one with MB229.5 approval locally.
So I had to use Liquid Moly 5W40 Leichtlauf High Tech. which is MB 229.5 approved
I am not happy with Liquid Moly 5W40 Leichtlauf High Tech as far as oil pressure at high oil termperature is concerned
While it is supposedly have a good Vicosity Index at 195, better than the Mobil 1 I been always using at VI 185...... the Mobil 1 has better oil pressure at high temperature.
Okey dokey, I will use this Liquid Moly for perhaps under 4,000KM and 6 months and go back to my usual Mobil 1, or find the FUCH with MB229.5 https://petroleumservicecompany.com/...FE%205W-40.pdf
BUT.....This Fuch has lower VI at 169
Maybe I will just stick to my usual M1 0W40 gold color bottle.
Last edited by S-Prihadi; 09-04-2022 at 12:52 AM.
Reason: typo
I forgot to add.
Our M276 oil cooler is coolant cooled. So the engine oil will be hotter at least 10C above coolant temp.
No way the oil can be cooler than the liquid its cooled with ...unless in weed land or the cooler is engine oil to air ( like Tranny oil cooler ) and car is moving.
My test is car stationary and I revved to 4.2K limited.
Thank you for stepping all over this research topic. Some people over look oil because it's not a trendy subject under spot lights... No mater what, oil is still essential in many ways for friction and for cooling.
poor lubrication causes short engine life...
The author @DanD may ignore pistons cooling sprays are turned off below 3.5kRPM... everything gets toasty thanks to ultra-lean combustions and restricted lube.
Your pressure test of Mobil1 vs. LiquiMoly practically reveals LM is a basic under performing oil pumped up with advertisement for profit.
oil championship 👍
There is a whole series you can watch... above are the results and here is...
Unlike Amsoil, Shell is well distributed all over. Amazon carries the ultra platinum oil type.
Wow...I did not know Penzoil owned by Shell.
Shell is decently strong here in Indonesia with their petrol station, but I am never a fan of their engine oil based on yachts diesel engine experience.
Damn damn damn.
Amsoil Indonesian distributor does not stock the european formula of W40. They got the W20.... yuck !!! So can't get MB229.5 approval one locally and I do not want any lighter than W40 because I have a turbocharger.
MB229.5 Shell Helix HX8 X does not have W40 weight, the HX8 has W40 but Shell Indonesia does not carry it. Ultra also not available locally if W40
So me gotta go back to Mobil1 0W40 , gold color bottle. From oil pressure stability at high oil temperature based on idling 600 RPM.....and MB229.5 approved.
Ams oil is a great company, they also pioneered the synthetic oil market, I worked with them on a small tech project 20 years ago, I use Mobil one, but if I had to make a second choice it would be Amsoil
3/4 retired, itchy handed, certified OCD ..... what to do.... LOL
Buy yourself 100 years old car like I did.
Did not read all of it, but judging oils by the pressure they develop is very misleading.
When I am using only 229.52 in my diesels, they come only with up to 30 weight.
The idea is that hi-tech additives make lighter oil still giving excellent protection, the lower pressure and friction give 3% fuel savings.
I do oil test after most of oil changes. The blackstone lab ALWAYS tell me that I can go farther than 13k miles the FSS gives me on Mercedes.
This Liquid Moly is 229.5 approval ( my engine can only use 229.5 ) same as Mobil 1 I been using.
103C at engine coolant is 113C at least at the engine oil. So loosing/less 2 psi there at idling 600 rpm the Liquid Moly virgin brand new zero KM compared to a tire 10 months old but 1,100KM only , matters to me.
The report by another use which tested the oil twice : is also not comforting
I agree, purely oil pressure comparison is not the way, but that is the only way for me to test and a simple one.
Film strength is related to oil pressure/viscosity. Vicosity is related to temperature. Oil pressure does matter.
I dont have US Blackstone Lab here, too bad.
I have had issue with oil pressure dropping on a long 10+ hour run on yachts delivery Singapore-Jakarta, it was using Shell Rimula not the highest performance one. The Low Oil pressure alarm was triggered.
I checked with other captains and they had the same experience using Shell Rimula on their Singapore-Thailand run. Also MAN engines. Some V-8 and V-10 and V-12.
When I swapped to the best of the FUCH called Titan Truck, all is good. I cruise at that time 2,100 RPM out of WOT of 2,300 RPM.
MAN Marine engines has 3 oil grades we can choose. 3rd one is the highest performance one. I use the best one always.
My last use was Shell Rimula highest performance one, on MAN V8 in 2017, so far so good on the oil pressure.
Same Singapore to Jakarta run and one of the leg was a near 15+ hours run because by dark 6PM I slow down to 8 knots, in daylight I cruise 23 knots.
335 n.miles approx that leg. Here I do fast cruise 23 knots at 1,900-ish RPM out of WOT 2,300 RPM.
So if any new zero KM oil when hot has less pressure than the Mobil 1 OW40 gold bottle I am using, that is an alarm bell....for me.
Anyway, Liquid Moly failed the oil pressure target....yep, I cheated a bit and use 104C coolant temp instead of typical 95C ish my ECM set the coolant temp at and Instrument Cluster cheated all of you to show 85C ish at the gauge.
Mid RPM performance also LM not good. All data points are 5HZ, so it is very fast at 5 data points per second.
One thing I can not confirm is, between Mobil 1 and LM, did the 2nd stage oil valve de-activated*( *meaning oil valve at 10% PWM or near OFF and oil pressure will be higher ) before 3,500 RPM or not ?
The algo MB uses is not purely RPM based, but temperature based too. The oil pressure is a software modeling.
So far I have seen the oil valve PWM by ECM at 10%, 80%, 85% and 90%.....I have yet to see mid value like 40-50%.
Anytime 3,530 RPM and above, the oil valve will be deactivated (10% PWM ) and oil pressure will be higher or NORMAL un-restricted/un-regulated and 55 PSI is about as high as the oil pump can do.
It is easy to detect oil valve deactivation ( 10% PWM) , oil pressure will jump to 50 ish PSi fast.
"MB approved" oils... :
@ 2000rpm: MOB1: 40psi vs. LM: 28psi
@ 2500rpm: MOB1: 54psi vs. LM: 27psi
Master Surya: I love your ability to concentrate on unic subjects that are essential.
When people speak non-sense with sales fluff, you hook the gauges and plot your data for a reality check.
If MB 222.5 approved oil list was worthy of consideration, certified oils would have narrower tolerances.
It seems real hard to fail that "certification"....
Instead MB should sort oils by compliance and disclosed measured criterias .... ✌️
The TBN (Calcium) is what helps offset old acidic oils softening sensitive seals. Great except calcium also deposits in heads and plugs up galeries.
Frequent timely oil changes like you do, are the educated way. Thank you for sharing your reality
Last edited by CaliBenzDriver; 09-06-2022 at 06:09 PM.
Been sending my oil to Blackstone Lab for over 30 years.
I had oil classes long time ago, but technology changed enough to make basic knowledge just inadequate.
In US you don't have independent agencies, who would keep records and do the test.
For years I was subscriber to Customer Report, but they "commercialized" and become useless.
That is why with all those 10k or 20k miles oil changes controversy, I decided to send samples to the lab. Bare in mind I always wait till FSS gives me a warning about coming oil change and since timer on FSS is forced by US lawyers, I tend to ignore time-related warnings (I drive much less on my retirement).
So last oil change I did on my Sprinter, who had 16k miles on the oil. Sprinters do have bigger oil pans, therefore 20k change intervals, but I bought this Sprinter over 2 years ago and have no solid records what and when was changed. I took service mileage from ECU.
So after at least 3 years and 14.5k miles, blackstone advise to keep the oil longer.
Been sending my oil to Blackstone Lab for over 30 years.
I had oil classes long time ago, but technology changed enough to make basic knowledge just inadequate.
In US you don't have independent agencies, who would keep records and do the test.
For years I was subscriber to Customer Report, but they "commercialized" and become useless.
That is why with all those 10k or 20k miles oil changes controversy, I decided to send samples to the lab. Bare in mind I always wait till FSS gives me a warning about coming oil change and since timer on FSS is forced by US lawyers, I tend to ignore time-related warnings (I drive much less on my retirement).
So last oil change I did on my Sprinter, who had 16k miles on the oil. Sprinters do have bigger oil pans, therefore 20k change intervals, but I bought this Sprinter over 2 years ago and have no solid records what and when was changed. I took service mileage from ECU.
So after at least 3 years and 14.5k miles, blackstone advise to keep the oil longer.
Thank you Kris, it sure is a lot of numbers to process.
Larger oil sumps, diesel motors, highway driving and a quality oil can really last the distance.
Thank you Kris, it sure is a lot of numbers to process.
Larger oil sumps, diesel motors, highway driving and a quality oil can really last the distance.
Have very similar report from my 2014 E250 Bluetec, who having FSS reset to 10k miles allows me 11-14k miles between changes. I drive it less lately, so that takes over 2 years, so I tend to change the oil prematurely a 11k miles, what made even 2 years last time.
250 Bluetec takes 7 l of oil.
Curious, how in the world did you come up with this conclusion?
Very basic oil knowledge.
Each modern oil comes with chem and detergent pack, calculated for certain mileage.
It will wear out with mileage, so at about 1/2 of recommended interval, or about 6000 miles on our car it comes to perfect balance and than it becomes low on additives, unless you do refreshing addition.
So changing oil at 5000 means you dump perfectly balanced oil and are replacing it with high-detergents and chemistry.
That is hard tell in real life as differences are not big and nobody will test if the same engine will do 500k miles on recommended changes, or 450k miles on premature ones, but that is where lab test will help you.
Very basic oil knowledge.
Each modern oil comes with chem and detergent pack, calculated for certain mileage.
It will wear out with mileage, so at about 1/2 of recommended interval, or about 6000 miles on our car it comes to perfect balance and than it becomes low on additives, unless you do refreshing addition.
So changing oil at 5000 means you dump perfectly balanced oil and are replacing it with high-detergents and chemistry.
That is hard tell in real life as differences are not big and nobody will test if the same engine will do 500k miles on recommended changes, or 450k miles on premature ones, but that is where lab test will help you.
Thanks for stating your point. Oil detergents have existed since forever, mainly to control sludge build-up and reduce acidity. They don't harm your internals even if you change the oil once a month.
09-04-2022, 12:50 AM
as far as oil pressure at high oil termperature is concerned
or the cooler is engine oil to air ( like Tranny oil cooler ) and car is moving.
