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  #73  
Old 07-29-2015, 02:07 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by billt View Post
You're going the long way around the barn with all of this. And in the process over complicating it to the max. Chrysler manufactures the Jeep Grand Cherokee. They also manufacture the 5.7 Hemi V-8.

Because of this they, in their owners manuals, recommend a certain weight and specification of motor oil. I, like most owners of a new car, choose to follow that recommendation to the letter. Because there is no good reason to substitute what I, or anyone else thinks is a "better" choice. Why is this concept so difficult for you to grasp?
I think you've misunderstood me.

I'm saying to follow the manual to the letter - as in the exact weight they specify.

BTW: they say "must use" not "we recommend". There's really no wiggle room in that.

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  #74  
Old 07-29-2015, 03:28 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by NetworkTV View Post
I think you've misunderstood me.

I'm saying to follow the manual to the letter - as in the exact weight they specify.

BTW: they say "must use" not "we recommend". There's really no wiggle room in that.
Does anyone recall the first Hemi MDS, and the oil it recommended?

Reason I ask is that an acquaintance had one, and the MDS didn't quite work as advertised [resulting in a buy back]. Can recall other stories/rumors of early MDS not always working as planned--but don't recall if it was the oil or the internal switching of the engines or all of the above.

It would be interesting to compare some of the newer synthetics made from natural gas based stocks to some of the traditional dino pee ones.
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  #75  
Old 07-30-2015, 11:25 AM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by BlckWK2 View Post
This is amazing to see all the actual engine testing engineers come out and defend their reasoning to deviate from the actual recommended oil spec for these vehicles.

Look. The bottom line is do what you want. Follow the manual, or not. The OP posted a simple question of what you are using in your vehicle. It shouldn't be a debate on what is best.

To answer the OP's question, I use 5w20 as prescribed in the owners manual. If I deviate then I will ensure the oil used will be met with a MS-6395 stamp.


--------
Phil
Phil,

Thanks so much for your post and answering my simple question. I have to admit my intention was to simply get feedback on brands, and never at a moment I thought my question would have ran in so many directions. I do wish I had limited my question to the 3.6L engine, but no regrets, I am learning quite a bit with this debate.

To put it in perspective: these specs on oil shows there is very little (probably negligible) difference between 0w and 5w, and noticeable differences begin to be evident when both are compared to 10W-30

Mobil 1 0W-20
SAE Grade 0W-20
Viscosity, @ 100C, cSt (ASTM D445) 8.7
Viscosity, @ 40C, cSt (ASTM D445) 44.8
Viscosity Index 173

Mobil 1 5W-20
SAE Grade 5W-20
Viscosity @ 100C, cSt (ASTM D445) 8.9
Viscosity, @ 40C, cSt (ASTM D445) 49.8
Viscosity index 160

Mobil 1 10W-30
SAE grade 10W-30
Viscosity @ 100C, cSt (ASTM D445) 10.1
Viscosity, @ 40C, cSt (ASTM D445) 63.2
Viscosity index 146


In my humble opinion, not going with manufacturer's recommendations solely on cold-crank performance is silly, the engine is performing most of the time at higher temperatures, and the total number of revolutions the engine does at those temperatures far outweigh any consideration of what MIGHT be happening when cold start. I am no car expert, just someone who looks at what makes sense. FYI, I have heard for example, from Ford MC outreach online material, that their engines (and basically all modern engines regardless of manufacturer) do reach operational temperature within the first 5-10 seconds-therefore, are we really making a difference with the oil we choose solely on cold start viscosity and other factors? (caveat, I have no idea of the pros/cons of the viscosity index; shown as reference for comparison--and hopefully, further the "respectful" debate we have so far)

One has to ask, how often do you really find yourself in extremely low temperatures to favor oil performance to that temperature than the combine benefit of the oil performance at higher engine temperatures prevailing the rest of the day?
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  #76  
Old 07-30-2015, 11:52 AM
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Re: Whats your choice of oil for your WK2?

In case anyone is interested, here is a link to MS-6395 specification


MS-6395...MOBIL1!...Amsoil?? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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  #77  
Old 07-30-2015, 12:18 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by lstowell View Post
Does anyone recall the first Hemi MDS, and the oil it recommended?
You bring up a good point. These oil weights and specs. are constantly evolving much the same as the systems, (MDS), that require them. What was recommended for a 2009 HEMI, might not be what flies for a 2015.
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  #78  
Old 07-30-2015, 03:08 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by Oblivion View Post
I have heard for example, from Ford MC outreach online material, that their engines (and basically all modern engines regardless of manufacturer) do reach operational temperature within the first 5-10 seconds-therefore....
Got a source for that claim?

I can't think of any modern engine that doesn't take at least a few minutes to warm up. There are many factors that contribute to this. Engine block material, ECU tuning, coolant type and capacity, ambient temperature, engine oil capacity (engine oil helps cool some components) etc, etc. All of these components take time to fully warm up, and it's not gonna happen in just 10 seconds.
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  #79  
Old 07-30-2015, 03:33 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by Hemispin View Post
Got a source for that claim?

I can't think of any modern engine that doesn't take at least a few minutes to warm up. There are many factors that contribute to this. Engine block material, ECU tuning, coolant type and capacity, ambient temperature, engine oil capacity (engine oil helps cool some components) etc, etc. All of these components take time to fully warm up, and it's not gonna happen in just 10 seconds.
At 30-40 below, I'd be happy to get 10 minutes, not seconds, for engine warmup.

The claim is easy to check with the EVIC, keep an eye on the water temperature and the engine oil temperature.

Then, get the bad news when you try to drive away and notice how much more slowly the transmission temperature goes up.
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  #80  
Old 07-30-2015, 05:07 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by Hemispin View Post
Got a source for that claim?

I can't think of any modern engine that doesn't take at least a few minutes to warm up. There are many factors that contribute to this. Engine block material, ECU tuning, coolant type and capacity, ambient temperature, engine oil capacity (engine oil helps cool some components) etc, etc. All of these components take time to fully warm up, and it's not gonna happen in just 10 seconds.

I might. Give me till tonight. Let me see what. Find


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  #81  
Old 07-30-2015, 05:34 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by lstowell View Post
At 30-40 below, I'd be happy to get 10 minutes, not seconds, for engine warmup.

The claim is easy to check with the EVIC, keep an eye on the water temperature and the engine oil temperature.

Then, get the bad news when you try to drive away and notice how much more slowly the transmission temperature goes up.
You're reminding me of my January days, (and nights) in Illinois. God I hated it when the temperatures got well below zero. Cars barely starting. Taking forever to warm up. Shock absorber seals blowing out driving over railroad tracks when it's 15 below. Transmissions shifting like they're filled with Jello and sawdust.

Every leak I ever had in a vehicle, happened in the Winter in Chicago. Radiators, water pumps, shocks, power steering pumps, name it and it leaked in Chicago's below zero Winters. I've done -27F there, and I've done 120F out here. I'll take the heat any day of the week, and twice on Sunday!
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  #82  
Old 07-30-2015, 06:49 PM
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Re: Whats your choice of oil for your WK2?

20w is 20w no matter what its cold weight is rated at. one thing to remember there are guys here in the motor trade and there are guys here with no idea at all who believe in what they read on the internet over believing guys that work on engines for a living.
go figure use what your happy with but dont discount the fact that there are guys here who know what they are talking about with the actual facts to back themselves up from many years of experience and daily dealings with oil companies.
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  #83  
Old 07-30-2015, 07:03 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by Oblivion View Post
Just wondering what everyone prefers to use when changing oil? Brands? Synthetic? Etc!!


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I did some searching around in Australia and ended up using the AMSOIL Brand because it was the only oil I could find in Australia that meets the Chrysler Standard for my 2015 JGC SRT

Is your Engine Oil Correct in Australia
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  #84  
Old 07-30-2015, 07:11 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by nicjak View Post
20w is 20w no matter what its cold weight is rated at. one thing to remember there are guys here in the motor trade and there are guys here with no idea at all who believe in what they read on the internet over believing guys that work on engines for a living.
go figure use what your happy with but dont discount the fact that there are guys here who know what they are talking about with the actual facts to back themselves up from many years of experience and daily dealings with oil companies.
You seem to be carrying on endlessly, defending what you know, or try to convince others you know. What does any of that have to do with following the owners manual along with what the manufacturer recommends? You seem to be taking it personal that people are choosing to follow manufacturers recommendations, instead of yours.
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