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  #31  
Old 02-17-2013, 12:47 AM
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Asur-good info on oil. 40 weight on the high end, especially in BC, seems very thick...
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  #32  
Old 02-17-2013, 10:33 AM
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Quote:
Originally Posted by RamTech View Post
If you encounter MDS operation issues accompanied by a MIL, expect to pay the diagnostic fee from your own pocket only to be told to change your oil.
MIL is "Malfunction Indicator Lamp" for those who do not know all the acronyms from the engine shop book. Its also known as a "Check Engine Light"

Last edited by Asur; 02-17-2013 at 10:37 AM.
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  #33  
Old 02-17-2013, 12:08 PM
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Why use 0-40 or something else anyways.. whats the point 5-20 is easy to get and
its recomended to use.
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  #34  
Old 02-17-2013, 12:33 PM
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Originally Posted by s1000rrhp View Post
Why use 0-40 or something else anyways.. whats the point 5-20 is easy to get and
its recommended to use.
This may help in understanding why some will change there oils to other viscosity's.

http://www.ramforumz.com/showpost.ph...1&postcount=27
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  #35  
Old 02-17-2013, 03:01 PM
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Quote:
Originally Posted by Asur View Post
This may help in understanding why some will change there oils to other viscosity's.

http://www.ramforumz.com/showpost.ph...1&postcount=27
well its not worth the risk for me, unfortunately chrysler has more money than me to put up in a lawsuit

Last edited by s1000rrhp; 02-17-2013 at 03:14 PM.
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  #36  
Old 02-17-2013, 03:10 PM
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^^^^^I hear that
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  #37  
Old 02-17-2013, 09:37 PM
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Quote:
Originally Posted by Asur View Post
This may help in understanding why some will change there oils to other viscosity's.

http://www.ramforumz.com/showpost.ph...1&postcount=27
What is the source of this?

Quote:
Originally Posted by s1000rrhp View Post
well its not worth the risk for me, unfortunately chrysler has more money than me to put up in a lawsuit
Yes agreed and second guessing many years of engineering does not seem prudent to me.
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  #38  
Old 02-17-2013, 11:57 PM
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The source for Asur's article is from a webpage by an authorised independent Amsoil dealer.

HERE

As to who specifically wrote the article, that's anyone's guess as I don't see it on Amsoil's official webpage.

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  #39  
Old 02-18-2013, 12:50 AM
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Yup, thats where I found it. It is just something that I found while looking into more info on oil and thought it was an interesting Read. I thought it could be for others also as this is more info to add to an interesting topic.

I am reading more and more that you will get about 2% more Fuel economy with 5w-20 oil but many are stating your getting 30% less engine life, here is another interesting read.

http://www.synlube.com/sae5w-20.htm

I will keep searching for more information, being that I will be keeping this truck for a long, long time, Its in my best interest to protect my engine as much as I can, if this would mean loosing 2% fuel economy but longer engine life, I am interested in finding information on that.

Short exert from the article:

Now you might ask: "Why all that mambo jumbo and mass quantity of information?"
Based on our experience 99.8% of motorists have absolutely NO IDEA what the SAE Numbers on Motor Oil Labels really mean.
Many believe that the simple recommendations in their vehicle owner's manual are "cast" in concrete, and the SAE viscosity of recommended Motor Oil can not be changed under ANY circumstances.
The fact that it is quite appropriate to either increase or decrease the motor oil viscosity, which is recommended in your vehicle owner's manual.
If it is appropriate for YOUR particular operating conditions as well as desired engine life.
Here are some REAL time, as well as, laboratory tested "ultimate" and unchangeable truths:
  1. The ideal oil viscosity for motor oil used in conventional piston engine operating at the "normal" engine operating temperature is equivalent to SAE 30. (In range of 9 cSt to 12 cSt @ 100 C)
  2. If you use thinner oil (SAE 20) under these "normal" operating conditions there will be LESS resistance to motion due to reduced viscosity, and therefore BETTER Fuel Economy will result. This gain in fuel economy does not however occur without costs:
    • Increase in oil consumption due to lower viscosity. Can be offset by better seals (they cost more)
    • Increase in oil consumption due to higher volatility. Can be offset by synthetics (they cost more)
    • Decrease in Engine service life due to increased boundary wear under some operating conditions
      (this will cost more per mile driven or per engine operating hour)
  3. If you use thicker oil (SAE 40 or SAE 50) under these "normal" operating conditions there will be MORE resistance to motion due to increased viscosity, and therefore WORSE Fuel Economy will result. This LOSS in Fuel Economy is somewhat compensated for by:
    • Decrease in oil consumption due to higher viscosity.
    • Decrease in oil consumption due to lower volatility
    • Increase in Engine service life due to reduced boundary wear and better separation of parts in relative motion.
  4. If the ambient or operating temperature is INCREASED from the "ideal" or "normal" (70 F) then the oil viscosity MUST BE INCREASED to assure same level of protection and lubricating oil film integrity.
    (It is not just better, but a must to use SAE 40 oil at 100 F ambient and SAE 50 at 120 F ambient)
  5. If the load is increased such as when towing, the oil viscosity MUST be increased to assure the same level of protection. (Use SAE 50 when towing)
  6. If the engine speed is INCREASED such as during long distance high speed driving in low ambient temperatures (so that the bulk oil temperature is not increased) the oil viscosity could be DECREASED that is SAE 20 is preferred to SAE 30 oil. (This however works ONLY in manual transmission vehicles where vehicle speed and engine speed are proportional and higher RPM can be maintained by more frequent downshifts if necessary)
  7. If the load is decreased then the oil viscosity can be DECREASED
    (When Empty Tractor is driven at 70 MPH on Interstate, it is OK to use SAE 30 instead of the SAE 40 that is specified and appropriate when the Tractor is hauling maximum load at 55 MPH)
  8. The most important factor related to long-term engine durability and component wear seems to be:
    High-Temperature / High-Shear-Rate specification shown in the last column of the SAE J300 Standard.
    For SAE 20 oil it is 2.6cP minimum.
    For SAE 30 oil it is 2.9cP minimum.
    For SAE 40 oil there are two specifications 2.9 cP same as SAE 30 and 3.7 cP which is the same for SAE 50 and SAE 60, but why? Well the first specification is for light-duty engines (cars that are not expected to last beyond 70,000 to 150,000 miles) and the second for heavy duty engines (that is engines which are expected to last up to 1,000,000 miles). That is why oils which are labeled as HD or Heavy-duty must satisfy the second SAE 40 specification of 3.7 cP.


When you read this article, there is a ton of interesting information, again, its a sales info for there oil, so in the end it can be biased towards what there selling, but it makes a lot of sense. Worth reading.

You might want to read this one also

http://www.machinerylubrication.com/Read/518/motor-oils

Last edited by Asur; 02-18-2013 at 01:06 AM.
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  #40  
Old 02-18-2013, 09:39 AM
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Originally Posted by Grubrunner View Post
The source for Asur's article is from a webpage by an authorised independent Amsoil dealer.

HERE

As to who specifically wrote the article, that's anyone's guess as I don't see it on Amsoil's official webpage.

Thank you Grubrunner for the info. It was interesting reading and worth pondering and considering Amsoil sells oil in the 5w-20W flavor, I suppose there is no ulterior motive behind the article. But for me, I believe doing the right thing for my truck, is to follow the manufactures specifications.
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Last edited by Hermes1; 02-18-2013 at 09:41 AM. Reason: Content
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