[W126 Coupe] Oil change

[FPecar4525 at aol.com]

Early synthetics got a bad reputation for leaking. This was  because, 
despite the claims of the oil manufacturers, the seal-swell  characteristics of 
the new synthetics were different from those of the mineral  oils they 
replaced. If the seal-swell rate was lower, the seals shrank and oil  leaked from 
crankshaft seals and rocker cover seals. If the rate was higher, the  seals 
swelled a little extra and the engine was tight. Then if the owner changed  
back to mineral oil, or added a quart when no synthetic was to be had, 
things  got really bad. The crank seals had become worn, in their turgid state, 
and then  relaxed. The valve cover seals were compressed when swelled, and 
when the  different oil was added, everything leaked like, well, an old 
English sports  car.   Now, most  think the situation has improved; you should 
even have no problem switching back  and forth.
 
 
In a message dated 11/14/2010 10:56:09 A.M. Pacific Standard Time,  
markusfmeyer at gmail.com writes:

Jay,
 
My experience has been the same - no leaks, no engine work, etc on  
multiple cars with many combined years and miles.  I'm sticking to  it.  You stick 
to what you do if it works for you.  Just don't  spread falsities about 
synthetic oil please!  You obviously have NO  personal experience with it 
yourself, as you state below.  So everything  you are saying is either heresay or 
what you may have read somewhere.   What I am stating is personal 
experience, and good experience at that.
 
Markus


On Sun, Nov 14, 2010 at 1:09 PM, Jay Hirsch <_J.Hirsch at mac.com_ 
(mailto:J.Hirsch at mac.com) > wrote:


>From MBUSA on  synthetic oil in  Montvale, NJ   and also BMW USA in 

Montvale.  I live fifteen miles  from each and do work for both.   

Believe what you want, do what you want. 
 I have three cars that are 50 years old with over 200,000 miles  each.  
Never used synthetic, original motors...all GM engines.
i like to put my cars on  a  lift every  three or four  months for visual 
inspections and change the  oil and filters when I  do
The cost of oil is minimal compared to the cost of  engine  work.


"Supposedly" is in the eyes of the beholder.


Where is your dealer?    
 



On Nov 14, 2010, at 12:50 PM, Markus Meyer wrote:


Jay -
 
Sorry, but that is the biggest nonsense I've ever heard!  I am  proof of 
that with my fleet, all switched over later, zero problems.   And its not a 
waste of money, actually, I calculated I save quite a bit of  money.  I used 
to do what you do, every 2500 (close) with dino.   If driving 10K per year, 
that's 4 oil changes, plus the work, etc.   Now I do it once and done.  Less 
mess, less work, less money.   And supposedly better for your engine.  I 
have over 100K on  each vehicle I have it in (6 cars, Rv, motorcycle).
 
I say its nonsense because there is no proof and your statement could  
scare people off from it, which is silly.  And which Mercedes dealer  will tell 
you this?  Mine hasn't.
 
Markus


On Sun, Nov 14, 2010 at 12:38 PM, Jay Hirsch <_J.Hirsch at mac.com_ 
(mailto:J.Hirsch at mac.com) > wrote:

Synthetic is only good when  used  from when the car was new.  
1987 560 never had synthetic  in it when new
Once a car  has used regular oil, synthetic is a waste of  money and 
Mercedes will tell you this
Since I have a diesel I use 15W 40 Shell  Rotella in  all  my cars
I buy  it at Walmart best price on motor oils and anti freeze.  The only 
things I buy at Walmart
But any 10w 40 is fine.
Synthetic is not a really a synthetic bur motor oil with an  additive.
I change oil  and filter in my car every 2000 miles or every  four months. 
Jay H
 









On Nov 14, 2010, at 11:30 AM, Ronny 560sec wrote:


Hi All,
 
What is the best oil to  use for a 560 SEC.
My car needs an oil  change and I want to be sure to get the right one.
I ask this because  somebody told me the best is Mobil-1 synthetic.
That might be true for  new cars, but I do not know for my 1987 560 SEC.
 
Ronny
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