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  #25  
Old 10-25-2010, 09:30 PM
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Re: 5w 20 vs 10w 30

Quote:
Originally Posted by wjs81866 View Post
Service manager confirmed that MDS needs 5W-20 to operate properly. Amsoil offers a 0W-20 that replaces the 5W-20 that will work. But they don't offer an oil filter yet?
As long as the 5.7 didn't change from 2010 to 2011, the EAO 48 is the EA filter you may be looking for. They are just slow to update lookups this time of year.

Also, Amsoil has a new line of oil that will be released Nov 1st, that will be priced lower than M1 & other synthetics like penzoil platinum, etc. It is made to be drained at OEM intervals & use your quality filter of choice.
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  #26  
Old 10-25-2010, 10:10 PM
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Re: 5w 20 vs 10w 30

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Originally Posted by dubwarren View Post
I think i get better mpg using 5w20, but could i use 10w 30 or 10w 40 in my 11 overland with the 5.7? The manual calls for 5w 20, but doesnt that oil lead to quicker breakdown of the engine? I'd rather use the best oil i can get my hands on but dont want to mess the rig up....i know you guys will have the answer..I want a long engine life, any suggestions?
Hey dub, I just joined today and I think I can help. I have a 2005 Limited (5.7 V8) with 255,000 miles. The Hemi was recently tested and amazinly I was told it was "still stout!" The guy who told me was amazed! The day I bought it/her I put in Mobil 1 5w20 synthetic. On average I changed every 6k miles, but I have often gone 9k+. I also used/use a Mobil 1 Oil filter and a K&N air filter.

I have an Overland ordered and plan on doing the same. However I did read here that it is best to wait 1,500 miles before going synthetic. I will prob. wait the 1,500miles but maybe I shouldn't based on my current results...

MOBIL 1 5W20 is my advice.
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  #27  
Old 10-26-2010, 07:39 AM
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Re: 5w 20 vs 10w 30

5W-20 is required for the system to work properly, I put in Amsoil 0W-20 and it seemed to smooth out the MDS. (No I'm not an Amsoil dealer)
<LI class=style1>Chrysler MS-6395N - AMSOIL ASM replaces SAE 5W-20 and is recommended for extended drain intervals according to AMSOIL service interval guidelines.
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  #28  
Old 11-03-2010, 11:24 PM
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Re: 5w 20 vs 10w 30

What are your thoughts on this post from Mobile1 to use their 1 5W-20? Has anyone used it before?

http://www.mobiloil.com/usa-english/...S_Engines.aspx
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  #29  
Old 11-04-2010, 01:07 PM
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Re: 5w 20 vs 10w 30

I haven't used Mobile 1 in my Jeep yet, I typically use Amsoil but either way you will never notice a difference between one and the other. I just prefer Amsoil but that's not to say Mobile one isn't as good or better. Amsoil offers a 0W-20 oil that meets the Mopar standard. I have been using it in my Limited now for 1,000 miles and it seemed to smooth out the MDS but that could just be my butt dyno talking. I was told however NOT to use anything but 5w-20, meaning not 10w-30 as it could cause issues with MDS.
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  #30  
Old 11-04-2010, 01:18 PM
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Re: 5w 20 vs 10w 30

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Originally Posted by jeep2011 View Post
What are your thoughts on this post from Mobile1 to use their 1 5W-20? Has anyone used it before?

http://www.mobiloil.com/usa-english/...S_Engines.aspx
I think they’re referring to Mobile 1 5W-20 fully synthetic oil. The performance upgrade is nor about engine power but the other advantages of fully synthetic oil.
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  #31  
Old 11-04-2010, 01:50 PM
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Re: 5w 20 vs 10w 30

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Originally Posted by wjs81866 View Post
I haven't used Mobile 1 in my Jeep yet, I typically use Amsoil but either way you will never notice a difference between one and the other. I just prefer Amsoil but that's not to say Mobile one isn't as good or better. Amsoil offers a 0W-20 oil that meets the Mopar standard. I have been using it in my Limited now for 1,000 miles and it seemed to smooth out the MDS but that could just be my butt dyno talking. I was told however NOT to use anything but 5w-20, meaning not 10w-30 as it could cause issues with MDS.
robpp referred to MDS flutter earlier. You say it seemed to smooth out the MDS. How does an un-smooth MDS evidence itself?

I can notice no symptoms of MDS operation, except when I suddenly nail the throttle from low speed Eco mode. Then, there's a small hesitation until the surge of full power comes on from all 8 barrels.
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  #32  
Old 11-04-2010, 04:34 PM
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Re: 5w 20 vs 10w 30

Have used Mobil 1 in the 96 GC for 130,000 miles and it doesn't use a drop. Plan on using Mobil 1 0-20 in the WK2
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  #33  
Old 11-21-2010, 09:03 AM
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Re: 5w 20 vs 10w 30

BUMP

Has anyone put 0-20 in their cars? If you click on my fuelly link you guys will see that my gas took a huge hit. I thought that putting in some fuel crap in it would help but it didn't. I have another 3000 miles on my engine oil so I should be changing it with in a month or so. I did some reading around and I think that my gas mileage is being cause by the winter fuel that has been used. I believe I started to see bad mileage around that time. Also just for the hell of it, have anyone else seen a major (2 MPG) loss in their 3.7Ls? I only have 10.5K miles on mine.
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  #34  
Old 06-08-2011, 12:00 PM
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Re: 5w 20 vs 10w 30

This is from Amsoil saying why they recommend 0w-30 over 5w-30. I can ask they why they do the same for 0w-20 but I'm sure it will be the same response.

Q: "Why do you recommend Signature Series 100% Synthetic 0W-30 Motor Oil (AZOQT) over SAE 5W-30 Synthetic Motor Oil (ASLQT)"

A:"The 0W30 is the first choice as it can improve fuel economy, allow for easier cold starts, and reduced wear."

From quick personal research:
http://en.wikipedia.org/wiki/Motor_oil
A thin oil has a lower number and flows more easily, while thick oils have a higher number and are more resistant to flow.

http://auto.howstuffworks.com/fuel-e...estion1641.htm
At cold temperatures, the polymers are coiled up and allow the oil to flow as their low numbers indicate. As the oil warms up, the polymers begin to unwind into long chains that prevent the oil from thinning as much as it normally would. The result is that at 100 degrees C, the oil has thinned only as much as the higher viscosity number indicates. Another way of looking at multi-vis oils is to think of a 20W-50 as a 20 weight oil that will not thin more than a 50 weight would when hot.

Good resource: http://www.bobistheoilguy.com/motor-oil-101/

This page shows 0w to 5w in more detail.
http://www.bobistheoilguy.com/motor-oil-102/

From the two above links they explain in detail that 0w and 5w are too thick to provide lubrication at start up, but a 0w takes less time to get to the correct lubrication viscosity. So it gives better protection sooner then a 5w oil would. "It is said that 90 percent of engine wear occurs at startup." With that being said you would want to get better protection soon as possible.
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  #35  
Old 06-08-2011, 02:54 PM
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Re: 5w 20 vs 10w 30

Quote:
Originally Posted by dubwarren View Post
I think i get better mpg using 5w20, but could i use 10w 30 or 10w 40 in my 11 overland with the 5.7? The manual calls for 5w 20, but doesnt that oil lead to quicker breakdown of the engine? I'd rather use the best oil i can get my hands on but dont want to mess the rig up....i know you guys will have the answer..I want a long engine life, any suggestions?
I think you should visit the info on this thread... http://jeepgarage.org/showthread.php?t=24178


This is why:
Quote:
Originally Posted by http://www.bobistheoilguy.com/motor-oil-104/
"I truly believe that oil is much better being too thin than too thick. Over the years we have been going to thinner and thinner oils despite hotter engines with turbos and the like. The tendency is that people figure they need a 40 grade oils but then use a 50 instead. Better thinking is that if you think you need a 40, use a 30 grade oil instead. I firmly believe this based on all I know about oils."
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2007 Jeep Grand Cherokee 4.7L, 4x4

Done: Tow Hooks, Amsoil Severe Gear 75w-140, Amsoil Air Filter, Amsoil 0w-20, Amsoil T-Case, NGK V-Power, Skid Plate Front and Front Engine, Front Hitch, Hypergrounding, Shorty Antenna, 2" Old Man Emu Lift, Nitto Terra Graplers, Rola Rack
Need to be Done:Magnaflow Muffler, Fuel & Tcase Skid Plate,
The Electronics:Escort 9500ix, 400 Watt Inverter, Rockford Fosgate P2, Viper 5901, CB Radio, DB Drive 6.5, SuperChips, Rigid Dually Flood (Front), Rigid Dually Diffused (Backup)
Future Electronics: Mopar/Kicker 6x9 and dash, Scanner
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