Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #16  
Old 07-28-2001, 07:07 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,355
Quote:
Originally posted by DSinger
Mobil 1 15W-50 works great in all engines. It works best in the older ones though (eg. M119, M110, M104 and earlier). Basically up through the 97 switchover. The newer engines work as well if not better on 10W-30 synthetic.
DSinger,
Why do you think this?

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
Reply With Quote
  #17  
Old 07-28-2001, 08:52 PM
Southern_Son
Guest
 
Posts: n/a
The only caution I would add to the use of multi-weight is try not to cover a wide range of parameters with one oil. The buffers/medium that enable one oil to behave well from low to high temperature extremes does not contribute to lubrication themselves. Also, this is the substance that is first to 'coke-out' when exreme temperatures are encountered. In other words, instead of using 0-50w, try 10-30w or 20-40w. Most aircraft oils encounter some pretty high temps since the engines are air cooled and find themselves in some pretty tight cowlings so a great deal of pilots prefer a straight single weight, such as 80 in the northern climes and 100 in the south. This lessens the chance of oil breakdown. FWIW.
Reply With Quote
  #18  
Old 07-28-2001, 09:04 PM
longston's Avatar
Another View. . .
 
Join Date: Dec 2000
Location: Mark West, CA
Posts: 787
Viscosity Is Relative, Not Static...

First, read your owner's manual as regards recommendations for viscosity. The viscosity of a multigrade oil is determined by the climate you operate in, not just the year and model of car. For instance, I live in California, and for my cars, I need to use a higher viscosity rated oil, like 15W50. If I lived in a cooler climate, I could use 10W30, or even a 0W40. The "W" stands for "Winter", not "Weight"...

Some extremists believe that a 0W40 will work better for them even in California, because they think that the oil is at 0 viscosity when the car is started. That would only be true if the ambient temperature were cold enough to cause the oil to flow at 0 viscosity. If the temperature were say, 56°F, wouldn't the oil actually be about 10, or 15 anyway due to the rise in temperature from where the oil would be flowing at 0 viscosity? I don't know that answer yet, but I'd like to, so I will try to find out just what the temperate spread is on a multigrade oil.
__________________
"We drive into the future using only our rearview mirror."
- Marshall McLuhan -

Scott Longston
Northern California Wine Country...
"Turbos whistle, grapes wine..."
Reply With Quote
  #19  
Old 07-28-2001, 09:26 PM
Southern_Son
Guest
 
Posts: n/a
The flow characteristics of a 10w-40 oil matches what a straight 10 would do in cold ambient temps as well as a straight 40 at the higher temps. And yes the w stands for winter but is referred to as weight (why, I don't know). I don't know why the 80 weight aircraft oil is actually referred to as 40 and the 100 as a 50, either. Perhaps there is a 'proof' involved in aviation.
Reply With Quote
  #20  
Old 07-28-2001, 09:43 PM
Southern_Son
Guest
 
Posts: n/a
Longston, what dynamic behavior do you profess that oils possess?
Reply With Quote
  #21  
Old 07-28-2001, 10:05 PM
longston's Avatar
Another View. . .
 
Join Date: Dec 2000
Location: Mark West, CA
Posts: 787
Yes, But...

What I mean is at what temperatures does the oil exhibit characteristics of increased viscosity, and to what degree?

For instance, 10W30 is at a viscosity of 10 between what two temperatures before the polymers that make up the viscosity improvers cause the 10 to shift to a 15, or a 20, and then to 25, or 30?

And the numbers associated with aircraft oils are derived from the Mil. Spec., or Military Specification #. So, 30 weight, is actually Mil Spec. 1065, or commercial aviation # 65, while 40 weight is Mil Spec 1080, or commercial aviation # 80, 50 weight is Mil Spec 60, but commercial aviation # 100, and 60 weight is Mil Spec 1120, and commercial aviation # 120. Rememeber pilots, "proof" is never a safe thing in aviation. "12 hours from bottle to throttle" is a safe rule...

Multi viscosity oils should never be referred to as 10-weight-40. This is a misnomer carried over from single weight oils that are referred to as "30-weight", or 40-weight. 10W30 is simply, 10-30...
__________________
"We drive into the future using only our rearview mirror."
- Marshall McLuhan -

Scott Longston
Northern California Wine Country...
"Turbos whistle, grapes wine..."
Reply With Quote
  #22  
Old 07-28-2001, 10:11 PM
Southern_Son
Guest
 
Posts: n/a
Yeah!....what he said!
Reply With Quote
  #23  
Old 07-29-2001, 07:08 AM
Southern_Son
Guest
 
Posts: n/a
longston

Are you of the opinion that multi-grade oils exhibit changes geometrically from the low end to high end of ambient temperatures as opposed to directly proportional?
Reply With Quote
  #24  
Old 07-29-2001, 09:57 AM
Kuan's Avatar
unband
 
Join Date: Jan 2001
Location: At the Birkebeiner
Posts: 3,841
For all FSS cars:

The factory fill for 98's was pure dino oil.
For 2001's the factory fill was switched to synth/dino blend. Sometime in 2001 the factory fill was switched to pure synth. The switch was made right after the "recommendation" to switch to synthetic oil.

Kuan
Reply With Quote
  #25  
Old 08-01-2001, 07:29 AM
ChrisLiu
Guest
 
Posts: n/a
Hi Guys!

My W-140 92'300SEL runs on CHEMLUBE 10W-30 and is now running into 123K miles.

Best oil I have ever experienced with the engine silky smooth.

Comments from members who have tried CHEMLUBE!

Try it and you will feel the difference.

Happy Motoring.
Reply With Quote
  #26  
Old 08-02-2001, 03:56 PM
Kuan's Avatar
unband
 
Join Date: Jan 2001
Location: At the Birkebeiner
Posts: 3,841
Quote:
Originally posted by Southern_Son
Are you of the opinion that multi-grade oils exhibit changes geometrically from the low end to high end of ambient temperatures as opposed to directly proportional?
Actually...

Assuming you gathered some data and managed to get some points. At low temps, they will fit a straight line. At another temperature, they will fit yet another different straight line.

Kuan
Reply With Quote
  #27  
Old 08-02-2001, 04:12 PM
Southern_Son
Guest
 
Posts: n/a
Kuan, to what are you correlating the value of temperatures to plot yet a different function?
Reply With Quote
  #28  
Old 08-02-2001, 08:33 PM
Kuan's Avatar
unband
 
Join Date: Jan 2001
Location: At the Birkebeiner
Posts: 3,841
Talking

Sorry, I thought we were talking viscosity here. Never mind me...

Kuan
Reply With Quote
  #29  
Old 08-02-2001, 10:02 PM
Southern_Son
Guest
 
Posts: n/a
Oh, I thought you had something there I had not run across.
Reply With Quote
  #30  
Old 08-03-2001, 09:03 PM
SKY
Guest
 
Posts: n/a
So from what I read, I drew 2 conclusions
correct me if I am wrong

For synth..
thick oils like 15-50 should be used in hot climate?
while 10-30 or 5-30 should be used in cold climate?

does that apply to the FSS cars...for 98-2000 models i mean

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page