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  #61  
Old 07-27-2015, 09:38 AM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by MDBones View Post
FOR 5.7L 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 Fuel Saver Technology.
My owners manual says the exact same thing word for word. Now, why would I deviate from that just because some Internet know it all on a forum, thinks he knows better?

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  #62  
Old 07-27-2015, 03:54 PM
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Re: Whats your choice of oil for your WK2?

For what it's worth, I've tried several different brands of oil over the years, both dino and synthetic. I've never noticed any difference in sound of the engine, or increase/decrease in fuel mileage or performance. I've also never suffered an engine failure. Thus, I don't have a favorite. I usually buy what's on sale or lower price. I used to buy Pennzoil synthetic for my last car as it was about $22 for a 5 quart jug and that's what the car took. I ran it for about 8,000 miles. The ONLY reason I went with synthetic is for the longer oil change interval and lower overall cost. One synthetic change was about $28 for 8,000 miles. Two dino oil changes cost about $42 for 8,000 miles.

For my Jeep, the dealer changes my oil and they use Kendall 5w-20 synthetic blend. They keep sending me free oil change coupons, so why not? I get it changed at roughly 7500 - 8000 mile intervals. What people don't seem to realize is that today's engines are one of the most durable things in their vehicles. They will typically run to 250k easily, and the rest of the car might be falling apart by then. Of course there are exceptions to every rule, and I'm not going to waste my energy arguing different examples.

Change your oil and filter regularly according to the manufacturer's recommendations, don't abuse your vehicle too much, and it will last a very long time.
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  #63  
Old 07-27-2015, 05:58 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by billt View Post
What oils other than Pennzoil Platinum Full Synthetic (5W-20), meets Chrysler's MS-6395 spec for a 2015, 5.7 HEMI?

I have the V6 and use nothing but 5W20 Quaker State Ultimate Durability, full synthetic. It has the MS-6395 stamp on it.

Change (self) it about every 6,000 miles ( because I'm bored) and it usually registers 50% useful life on Evic when changed.

I stay with Quaker State only because that's what I've used in my older Jeep for the last 120,000 miles and I can get a 5 quart jug at Walmart for about $20.
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Old 07-27-2015, 06:23 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by Hemispin View Post
Change your oil and filter regularly according to the manufacturer's recommendations, don't abuse your vehicle too much, and it will last a very long time.

Good advice, don't abuse too much and do required maintenance and it'll last!
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  #65  
Old 07-27-2015, 08:02 PM
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Re: Whats your choice of oil for your WK2?

Purdy much so!
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  #66  
Old 07-29-2015, 12:17 AM
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Re: Whats your choice of oil for your WK2?

0w-20 (mobil 1) is what I use now, summer and winter. I use 0w- oil in all my vehicles now, most of which are out of warranty. Mostly 0w-40 M1. I live at 46deg N.

My reasoning:

Mobil 1 0w-20 says it can be used in any vehicle 5w-20 is recommended, I'm pretty sure that's on the bottle... (from what I know about oil, why wouldn't it).

It is generally thought of as better oil than a 5w-x wrt base stock used.

5w-20 in general is used to allow the MDS to work OK, which is a totally worthless piece of EPA BS, but as many many engines in all parts of the USA call for 5w-20 and 0w-20, why would I think it won't work? Manufacturers pick an oil that fits the marketing and EPA standards for their cars, NOT for longevity. Case in point, the Corvette LS7 engine specs a totally different oil in europe than it does in the US. I would think there are many other examples of this as well. I think one could argue 0w-40 in a JGC 5.7L would be reasonable as well, but I don't want a thick oil to effect the oil pump pressures, and as I don't race my JGC or get the oil above 250F, why do I need a thick oil when hot?

As long as my oil doesn't get overly hot (which it never does) the 20wt is fine. Whereas the 0w cold start benefit is obvious regardless of the climate.

Replacing the oil every 6 months or 8K miles means the 0w-20 won't leave spec by that time, that's proven by used oil analyses on many vehicles. As for UOA, I doubt Chrysler could prove my 0w-20 is not within range of a 5w-20 if they ever actually tested it in the event of a warranty issue.

There is very little difference between 5w-20 and 0w-20 oil so no reason to fight here.

But I personally see zero evidence of benefit of a 5w-20 over a 0w-20 EVER in what I've read (except the warranty issue). So why use a thicker cold oil every time you crank it over?

Every dealer I've ever talked to says they would not care what oil I use if there was a warranty claim, but I don't worry about an engine mechanical failure within warranty range...

That's my reasoning.
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  #67  
Old 07-29-2015, 12:42 AM
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Re: Whats your choice of oil for your WK2?

Quote:
Originally Posted by comnjeep View Post
0w-20 (mobil 1) is what I use now, summer and winter. I use 0w- oil in all my vehicles now, most of which are out of warranty. Mostly 0w-40 M1. I live at 46deg N.

My reasoning:

Mobil 1 0w-20 says it can be used in any vehicle 5w-20 is recommended, I'm pretty sure that's on the bottle... (from what I know about oil, why wouldn't it).

It is generally thought of as better oil than a 5w-x wrt base stock used.

5w-20 in general is used to allow the MDS to work OK, which is a totally worthless piece of EPA BS, but as many many engines in all parts of the USA call for 5w-20 and 0w-20, why would I think it won't work? Manufacturers pick an oil that fits the marketing and EPA standards for their cars, NOT for longevity. Case in point, the Corvette LS7 engine specs a totally different oil in europe than it does in the US. I would think there are many other examples of this as well. I think one could argue 0w-40 in a JGC 5.7L would be reasonable as well, but I don't want a thick oil to effect the oil pump pressures, and as I don't race my JGC or get the oil above 250F, why do I need a thick oil when hot?

As long as my oil doesn't get overly hot (which it never does) the 20wt is fine. Whereas the 0w cold start benefit is obvious regardless of the climate.

Replacing the oil every 6 months or 8K miles means the 0w-20 won't leave spec by that time, that's proven by used oil analyses on many vehicles. As for UOA, I doubt Chrysler could prove my 0w-20 is not within range of a 5w-20 if they ever actually tested it in the event of a warranty issue.

There is very little difference between 5w-20 and 0w-20 oil so no reason to fight here.

But I personally see zero evidence of benefit of a 5w-20 over a 0w-20 EVER in what I've read (except the warranty issue). So why use a thicker cold oil every time you crank it over?

Every dealer I've ever talked to says they would not care what oil I use if there was a warranty claim, but I don't worry about an engine mechanical failure within warranty range...

That's my reasoning.
The oils in Europe are different because the fuel is different.

The difference in full synthetic 5w vs full synthetic 0w for cranking cold is pretty small, unless you live at the north pole. So why risk a warranty issue.

If 0w is so much better, why don't manufacturers recommend it over 5w?
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  #68  
Old 07-29-2015, 10:09 AM
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Whats your choice of oil for your WK2?

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.


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  #69  
Old 07-29-2015, 11:48 AM
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Re: Whats your choice of oil for your WK2?

My take?

I'll go with what the guys who actually make the engine say, and that's Jeep. The oil companies don't make the engine, or any engines for that matter.

They make oil. Some of that oil meets a specific standard outlined by Chrysler. However, just because oil meets the standard, doesn't mean it's appropriate for every vehicle that uses the standard. When you take into account how different sports cars are from minivans which are different from SUVs, a particular "stamp of approval" means little.

MS-6395 only means Chrysler approved it, not that it's appropriate for use in a Jeep.

What matters is what specific specifications are called for by that particular vehicle.

That's what the owner's manual is for. It tells you exactly what the designers and builders of the vehicle call for.

Using anything else gives the manufacturer an out on the warranty to say you didn't maintain your vehicle properly.
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  #70  
Old 07-29-2015, 11:59 AM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by NetworkTV View Post
MS-6395 only means Chrysler approved it, not that it's appropriate for use in a Jeep.
Why would they approve an oil that was "not appropriate" to use in their engine? That makes no sense. If it's "not appropriate" for use in a Jeep, why does the Jeep owners manual specifically recommend it, and say so? Jeep is manufactured by Chrysler. That's like saying Remington ammunition is "not appropriate" for use in Remington firearms.

Vehicles equipped with a 5.7L engine must use SAE 5W-20 oil
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Old 07-29-2015, 12:23 PM
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Re: Whats your choice of oil for your WK2?

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Originally Posted by billt View Post
Why would they approve an oil that was "not appropriate" to use in their engine? That makes no sense. If it's "not appropriate" for use in a Jeep, why does the Jeep owners manual specifically recommend it, and say so? Jeep is manufactured by Chrysler. That's like saying Remington ammunition is "not appropriate" for use in Remington firearms.

Vehicles equipped with a 5.7L engine must use SAE 5W-20 oil
Chrysler makes more than just Jeeps.

It's like a THX standard: just because a piece of equipment meets the THX standard, doesn't mean it's the proper equipment for every theater.

Look, Jeep tells you exactly what specfic oil weight that meets their stanard is appropriate to use in a Jeep. That may be different than what they recommend for a Charger or a Ram. They may be all MS-6395, but they aren't the same.

In the end, use what you want, but keep in mind that we're talking corporations that pinch pennies to make billions. If they find out you ignored the manual and you have a warranty claim, they can tell you to shove it.

If they meant for you to use any weight, they would only specify MS-6395, not a specific weight.
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  #72  
Old 07-29-2015, 01:21 PM
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Re: Whats your choice of oil for your WK2?

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?
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