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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-28-2017, 05:17 PM
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Excellent talk about motor oils

I don't know if this has been posted here before, but this is a very good talk explaining engine oils (mostly), and other oils.

Enjoy.

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  #2  
Old 04-28-2017, 07:29 PM
arthurwood arthurwood is offline
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Quote:
Originally Posted by MatWiz View Post
I don't know if this has been posted here before, but this is a very good talk explaining engine oils (mostly), and other oils.
I'm typing this as I listen so consider it a really bad fat and ugly secretary stenotyping with two fingers as the boss gives a talk on motor oil.

Redline
Why oil is important (including other fluids like ATF & differneital)
cooling almost as much as collant does
trap contaminants
base stock is by api (5 groups)
1,2 crude oil based (petroleum oil)
3 hyrocracked version of that
4 synthethics
5 ester based

synthetic products don't change as much with temperature?
the guy talking says he bases his oil decision on cost
He starts with group 3 in his car but if he goes more miles then group 4 and up

He talked about weights viscosity 5W winter versus 30 operating temperature
0w30 is minnesota oil stays thin at the startup
10w30 doesn't mean it gets that thin in cold weather at temp
They're both the same stokes (measurement) at temperature

Track weights don't matter since it only runs hot.

The track guys tell if the weight is too thick by oil temperature on the temp gauge.
10w60 in a grand prix takes forever to get to 200 F and then takes a while to get to 270 or 280 or 290 F.
So they go to a 50 or 40 weight oil to get the heat up faster.

BMW has a thing called VANOS which runs on oil pressure and it won't run on less than a 40 weight on a track day. < what? >
So you can't go real light if you want that VANOS system to continue to work.

Oil temperature the "trash can" comes off at about 200 F i
But we want say 212F (100C) but as we get further than that the oil will get thinner
but it has the trash lid off the oil at least at 212 so it can start trapping contaminants

At 240 degrees this is actually ok to run but your 30 weight is no longer a 30 weight.
It's less than a 30 weight now as it was only a 30 weight at 100C (212F).

Friction modifiers LESSEN friction (make it more slick).
Take aware wear of the engine and make engine more efficient.
Same with ATF which are very slick.
GL5 gear oil is also slick for the differential to prevent chatter from the slip of the torque from one rear wheel to the other.
Friction raises the temperature so notice that a diff don't want chattering.

GL4 is for the manual transmission where you want a bit of friction because of "gear clash" in the box and the clutch.

High mileage motor oil (does it work) Yes but it depends.
Leaking engines can use the stuff to leave less drips.

They race BMWs with 190K miles and they use the cheapest oil they can to "flush" the contaminants into the motor oil with 4 oil changes within a few hours.
When they pull sludge out of the engine causes the bad gasket to start leaking.

Don't blame synthetics for leaking (the older days they did cause leaking by seal swell but not nowadays) That day is over.
But it might happen if you have swept away contaminant and exposed a bad gasket.

Snake oil additives.
Solvent based fuel additives aren't going to give you any big result.
Detergent basedfuel additives will give you a result if you had a lot of carbon in the combustion chanber and injectors.

You should get a 1 mpg mileage improvement (I call bs on that).
You're returning the vehicle to what teh OE wanted.

SOlvent based additives amy not have the "intensity" to clear out carbon.
If there is carbon on the pistion you have a 9:1 engine turned to a 9.5:1 or 10:1.
Fuel additives remove carbon to get back the oem performance.

Fuel top tier in the pump used all the time is actually pretty good.
The engine will be oe level thourhgout the life of the vehicle.

You can control the wear in teh engine with better motor oil.
If you look at the price point of the various oils you can improve the life of the engine. < what did he say? >

ANd then it ended.

Last edited by arthurwood; 04-28-2017 at 07:41 PM.
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  #3  
Old 04-29-2017, 02:05 PM
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Why did you feel the need to "summarize" the video? Do you doubt the ability of the members here to comprehend it?

But high points on the manipulation level. Many lazy guys around here will take your summary over listening to the engineer, so you got your spin in instead of the unspinned source.

Only if you didn't make so many "errors" in your "summary". Very strange. It is almost as if you have an agenda.
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Old 04-29-2017, 03:10 PM
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There is no need to talk about oil... The best is amsoil.. Its also thee most expensive..

Mobile1 works fine for our engines.. you dont have to turn this in to a science lesson
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  #5  
Old 04-29-2017, 06:39 PM
Chedley Chedley is offline
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Back to the religious wars about engine oil ? Castrol Synthetic 5W20 is the only oil you should use..
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  #6  
Old 04-29-2017, 11:15 PM
arthurwood arthurwood is offline
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Quote:
Originally Posted by MatWiz View Post
Why did you feel the need to "summarize" the video?
You must know the answer to that question so I'm surprised you asked.

Here's the math:
It takes about 20 minutes for the next person to listen to the video.
It took me longer because I had to stop it a few times, so figure 3x longer so about 60 minutes to type all that to help people here.

How long do you think it takes for someone to skim what I wrote?
Please do not respond unless you actually answer that question because that is the answer to your original question.

Quote:
Originally Posted by MatWiz View Post
Do you doubt the ability of the members here to comprehend it?
It is very surprising that you are confused because it is clear that it took me about an hour to type that up in order to save the viewers lots more time.

Let's assume there will be 200 viewers of this thread.
Sure, it cost me an hour to type it up for them.
But they each saved 18 minutes and got the same benefit of facts.
18 x 200 is what how much time saved for the same amount of data?

Please do not respond without doing that math and answering the question because that is the answer to your question.

Quote:
Originally Posted by MatWiz View Post
But high points on the manipulation level. Many lazy guys around here will take your summary over listening to the engineer, so you got your spin in instead of the unspinned source.
What part of my summary was not accurate?
Please take the time to back up your accusation.
I put my summary in words but you didn't put your accusation in words.
That's not fair.

Quote:
Originally Posted by MatWiz View Post
Only if you didn't make so many "errors" in your "summary". Very strange. It is almost as if you have an agenda.
On these unnamed errors you are accusing me of in addition to having an agenda, you should back up what you said because I backed up what I said with actual words.

Name the three most important "errors" you accuse me of.
< 1 > ?
< 2 > ?
< 3 > ?
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