2010 3.7l first oil cange this weekend - Jeep Commander Forums: Jeep Commander Forum
Regular Service / Maintenance This section contains discussion about regular service and maintenance (upkeep) of your Jeep Commander

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post #1 of 24 (permalink) Old 01-07-2011, 05:00 PM Thread Starter
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2010 3.7l first oil cange this weekend

Hey guys i got my 2010 xk in December 23rd and its telling me to change oil already im guessing the stealership didn't waste their money on one!! anyways I was thinking of going with mobile1 0w-20 full synthetic. I loved this oil im my past cars and wanted to know of any issues you may have run into . also I have a set of ramps is this all ill need to get under my new toy?


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post #2 of 24 (permalink) Old 01-07-2011, 05:54 PM
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You might want to get a Fumoto drain valve. Here is a thread on it---> https://www.jeepcommander.com/forums/showthread.php?t=5000&highlight=fumoto&page=7

And here is where you can get it---> http://www.lubricationspecialist.com/front/showcontent.aspx?fileid=105&gclid=CMXr8aipqZMCFSFk nAodKiWDcg

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post #3 of 24 (permalink) Old 01-07-2011, 06:03 PM
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Ummm,
Quote:
Originally Posted by 2010 Jeep Commander Owners Manual
Engine Oil Viscosity
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low temperature
starting and vehicle fuel economy.
The engine oil filler cap also shows the recommended
engine oil viscosity for your vehicle. For information on
engine oil filler cap location, refer to “Engine Compartment”
in this section.
NOTE: Vehicles equipped with a 5.7L engine must use
SAE 5W-20 oil. Failure to do so may result in improper
operation of the Multiple Displacement System (MDS).
Refer to “Multi-Displacement System” in Section 5 for
more details.
Lubricants, which do not have both the engine oil certification
mark and the correct SAE viscosity grade number,
should not be used.
The design of the motor, its clearances and tolerances and the conditions and temperatures you operate dictate the best oil viscosity to use, NOT what you liked from past motors that had a different design. The owners manual will recommend what they have tested to work best and for which conditions.

If you haven't installed an Oil Pressure Gauge and have some experience with understanding what its tell you, IMO its foolish to experiment with oil viscosity, I don't think I know more than the engineers that designed the engine, I listen to them.

BTW, I just picked up a 5qt jug of Mobil1 5W-20 Synthetic at Walmart.

If you've got the V6, and really want to use 0W-20, if you use a good quality synthetic, the extra film/shear strength of synthetic oil should make up for the lower viscosity selection, BUT, I have to ask why? Do you live in an area with a really cold winters and very mild summers?


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Last edited by Mongo; 01-07-2011 at 06:28 PM.
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post #4 of 24 (permalink) Old 01-07-2011, 11:19 PM
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The 0w-20 will flow better in cold temperatures - yet still provide the protection of the recommended 20 weight when fully up to temperature. An excellent selection regardless of where you live.

NO ONE on 4 wheels is more anal about motor oils than Ferrari owners (and their mechanics)

http://www.ferrarichat.com/forum/faq...=haas_articles

Last edited by TopFuel; 01-07-2011 at 11:24 PM.
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post #5 of 24 (permalink) Old 01-08-2011, 09:35 AM
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Quote:
Originally Posted by TopFuel View Post
NO ONE on 4 wheels is more anal about motor oils than Ferrari owners (and their mechanics)

http://www.ferrarichat.com/forum/faq...=haas_articles
Well I may be a country bumpkin rube, but seems to me, Chrysler Engineers that designed and tested the motor might know more about the best oil viscosity to use in their motors than Ferrari Owners and Mechanics.

Of course 0W-20 might work fine in your motor, why don't you post your oil pressure readings for different ambient temps, engine temps, rpm and load? And we'll compare.

There's a saying in the Engineering and Test communities; One Test is worth a Thousand Expert Opinions. Chrysler did a Multitude of Testing, and your Ferrari Forum, you don't have to read half his post to realize the guy is NEVER going to address individual application and actual result, and stay in the general. So, let me think, hmmm, yea, that was hard, I'm going with the Manufacturer's Recommendation.
Quote:
Originally Posted by TopFuel View Post
The 0w-20 will flow better in cold temperatures - yet still provide the protection of the recommended 20 weight when fully up to temperature. An excellent selection regardless of where you live.
Synthetic flows betters at all temperatures, especially cold, than conventional of equal viscosity, so just switching to synthetic of the same viscosity would provide those benefits.

Overlay or compare the viscosity charts for 0W-20 vs 5W-20, you'll see the viscosity is lower at all temps up, often even at the 100 mark and past it as well.

Oil is NOT digital, multi-viscosity does NOT mean it magically changes to a different viscosity oil when it reaches another temperature. Multi-viscosity oil means its an oil with modified viscosity, they plot the measured viscosity and describe the modified viscosity by what reference oil viscosity it is closest to at 2 different temperatures, low and high.

Plot one line with points (0,0) and (20,100) and another line (5,0) and (20,100) you'll find the 0-20 is lower than 5-20 the entire range until they converge at 100, and although its actually a curve, its the same thing, 0W-20 will be a lower viscosity through just about its entire temperature range than 5W-20, except at its high temp measured point.

As well, to achieve a wider viscosity range often requires the use of more additives that are especially the ones more likely to sheer and degrade with use and time and burn, leaving deposits in the motor. The sheering of the additives causes viscosity to drop faster and the oil to degrade faster and protect less the longer it is in the motor. Narrow range viscosity oils also tend to broaden the band of higher viscosity and drop off less in viscosity at the higher temp points past the high temp measuring point. If anything, if several multi-viscosity oil meets the conditions you operate, its more advantages to pick the narrower range of viscosity.
__________________________________________________ __________________________________________________ __________________________

Don't get me wrong, switching to 0W-20 is NOT that big of a change from 5W-20, especially if you are also switching to synthetic. Good quality oil and more frequent oil changes are going to eclipse the slight viscosity difference in protecting your motor.

BUT, far better qualified people have tested your motor and found the best viscosity oil to use, they published their recommendations in a book and put it in your glove compartment, so why NOT just read it? OR you could go to a Ferrari forum and listen to someone tell you his analysis of oil, totally isolated from the individual application, which he NEVER address's, and decide he must know more about your Jeep than the engineers that designed and tested it.

If anything, the manufacturers have been leaning toward the lowest viscosity possible for energy savings ratings, I don't know why you would want to go lower, unless your operating in temps far lower than intended for you vehicle.

How are those Ferrari tires working out on your Jeep? I mean if Ferrari owners use those tires, it must be better than lowly old Jeep Engineers select for your Jeep. How is your tornado air system doing creating all that extra HP? and those Extra Energy Spark Plugs? After all, we all know the engineers designing cars never try this stuff, if a 5 dollar part really made an extra 25HP, they would never think to include it with the vehicle as OEM.

Please, this is the thinking you get when people start musing about oil viscosity and how they know better than the designers that tested the motors, as too what would be the best oil viscosity to protect your motor. Its all B.S., like I said before, if your experimenting with different than recommended oil viscosity and do NOT have an oil pressure gauge on your vehicle, IMO, you're a FOOL. And if you're one of those people, I have a Tornado Gas Saver to sell you, its just a little piece of sheet metal that will improve your gas mileage and make more power.

Cause the guys selling this know more about your Chrysler Engine than the engineers that designed and tested it, thats why this works.


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Last edited by Mongo; 01-08-2011 at 01:27 PM.
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post #6 of 24 (permalink) Old 01-08-2011, 01:33 PM
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Quote:
Originally Posted by jdcommander View Post
also I have a set of ramps is this all ill need to get under my new toy?
Sorry, with all the hub-bub about choosing alternate oil viscosities, when there is absolutely no evidence to support switching, I forgot to address the 2nd question.

I'm much bigger than the average guy, and I was able to get under my Commander and change the oil with it just parked on level ground. Of course it was a bit of a tight squeeze, so if its worth it to you, pulling it up on ramps might make it easier, it wasn't worth it to me.


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post #7 of 24 (permalink) Old 01-08-2011, 02:13 PM
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The oil viscosity discussion will forever be one of those ever lasting arguments. I am on Mongo's side with it though.... people can swear by their more expensive 0W-XX all they want; but i guarantee if you put two engines side by side under the same exact conditions, one with 0W-20 and one with 5W-20, and you maintain both engines on a proper maintenance schedule... neither engine will last longer "because of the oil".

However, I very much doubt that running 0W-20 will "hurt" your engine either. IMO, it's fine to run it, but you're probably wasting your money.

I'm as anal as anyone when it comes to maintenance.... i will always run a quality synthetic oil at the weight specified by the owners manual (at least until i move to an arctic region where temps stay consistently below negative 40 degrees )

FYI: In my GM truck's owners manual there actually was a blurb where 0W-30 may be used for "extreme cold regions" instead of the 5W-30. So there is a place for it in some applications.

-Matt
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post #8 of 24 (permalink) Old 01-08-2011, 02:30 PM
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Thanks Matt, I totally agree with your points as well.

I just got wound up throwing the B.S. Flag. Oil is an incredible complex subject, and unless we have a Chrysler Engine Designer/Tester or Mobil1 Designer/Tester as a member of this forum, I don't any of us are qualified to judge which oil is best for a particular motor. BUT, someone that is qualified has recommended a viscosity for us, in the Owners Manual.

Yea, 0W-20 vs 5W-20, my bet it wouldn't really make a difference, if your maintaining the motor and changing the oil, especially if your using Synthetic. Of course I've seen people on other forums stating how wonderful 0W-20 was when their motors were suppose to use 10W-30, and NOT a single one of them had an oil pressure gauge on their vehicle to really know what was actually happening. And when pressed about what they saw that made it better, they just say things like, "well I keep hearing good things about it", "it hasn't failed me yet", I even had one guy say, "Pick up a bottle of 0W-20 and shake it, its like water, thats how good it is"

It just makes you shake your head....


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post #9 of 24 (permalink) Old 01-08-2011, 02:36 PM
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dude im right there with ya!!

I've personally done bearing design and oil viscosity analysis. Most people don't realize that oil too "thin" will actually result in a lack of lubrication.

I've tried to explain how it works on forums too because, having owned a lot of GM's where 5W-30 is recommended, there's always a few knuckleheads who "swear by" 0W-20... most of them say they do it just for better gas mileage too (as if the manufacturer wouldn't spec that oil already if it actually gave the vehicle a notable MPG boost )

Oh well... there's bigger things to worry about then a few guys running the wrong oil in their engines

-Matt
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post #10 of 24 (permalink) Old 01-08-2011, 02:50 PM
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Quote:
Originally Posted by Matt_ View Post
I've personally done bearing design and oil viscosity analysis. Most people don't realize that oil too "thin" will actually result in a lack of lubrication.
When I was a teenager with my first car, I was the opposite, I thought the thicker the oil, the better it protected and the higher the oil pressure the better the engine was being lubed. I was using 20W-50 in a motor that called for 10W-40. Thats just as bad as your example.

Its a balance between flow and pressure.

Its the right oil pressure, the right flow of oil through the motor that lubricates it the best. And motor designs differ and the right flow and right pressure will be different from motor to motor. And different viscosities will create different pressures and different flows through different motors.

I was worried about the OEM recommendation of 5W-20 for my Commander, all my previous vehicles were 10W-30, this seemed a bit thin for me. Then I installed an oil pressure gauge on my Commander, the 3.7L makes more oil pressure with 5W-20 then any of my previous motors with 10W-30, even when they were new.


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