Good News for Mobil 1 Fans!

[Mr._Bill]

My JK has the 3.8L motor, which takes six quarts of oil. However, the JT 3.6L motor only takes five. Why are folks posting in this thread about buying the six quart cases instead of the five quart bottle?

And, thinking of the five quart bottles, I bought one of Pennzoil Platinum full synthetic at Walmart. It was marked for $22 or so on the shelf. I get to the register and it rings up for $11. I tell the lady that's the wrong price, it should be over $20. She punches a few things into the register, looks at me and says that's all it is. I was tempted to go buy a few more bottles.

Sam's Club only has the six quart cases of 0W20 Mobil 1 on the shelf. If you buy five cases, that's six changes. I just happen to notice it on sale when I was in there last night. I've been watching prices on Amazon and buying the five quart jugs of 0W20 Pennzoil and Shell synthetic when it's around $20.

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[Ohio JKU]

A spare quart of Mobil 1 makes a good oil for things that go bang too...

 

[ACAD_Cowboy]

My JK has the 3.8L motor, which takes six quarts of oil. However, the JT 3.6L motor only takes five. Why are folks posting in this thread about buying the six quart cases instead of the five quart bottle?

And, thinking of the five quart bottles, I bought one of Pennzoil Platinum full synthetic at Walmart. It was marked for $22 or so on the shelf. I get to the register and it rings up for $11. I tell the lady that's the wrong price, it should be over $20. She punches a few things into the register, looks at me and says that's all it is. I was tempted to go buy a few more bottles.

Because we still have JK to worry about?

I just skimmed the JT mqnuql, I wonder if they took a quart out for windage in a vain attempt to squeeze just a hair more mpg out. Given all the hay the engineers made about cooling you would think increased capacity with a honking big cooler would have been on order.

 

[brianinca]

Ahhh yes been saving the M1 dregs for years, no decades, now!

Little squeeze bottles with narrow tips, just the ticket.

A spare quart of Mobil 1 makes a good oil for things that go bang too...

 

[DanW]

My JK has the 3.8L motor, which takes six quarts of oil. However, the JT 3.6L motor only takes five. Why are folks posting in this thread about buying the six quart cases instead of the five quart bottle?

And, thinking of the five quart bottles, I bought one of Pennzoil Platinum full synthetic at Walmart. It was marked for $22 or so on the shelf. I get to the register and it rings up for $11. I tell the lady that's the wrong price, it should be over $20. She punches a few things into the register, looks at me and says that's all it is. I was tempted to go buy a few more bottles.

Because I have other vehicles that run 0w20, including a Renegade and it can also be run in my 3.8 JK. Or, I'll save it for the next one. This last time around with the AFE, I bought a case of 6 and then told my cousin (18 JK) to buy a 5 quart jug and I just gave him the 6th quart.

I always think of oil in terms of price per quart when looking for deals. I prefer the jugs, but I keep enough of a stash that I can deal with an extra here and there. My stash right now has a bunch of Shell Rotella Gas Truck, 2 boxes (6 quarts each) of Chevron Pro DS, and 5 more quarts of Mobil 1 AFE. I prefer Mobil 1 and will run it the majority of the time, but I can't pass up a great deal, such as the Rotella, especially when it is free after rebate. Lol!

Man, I'd have cleaned them out of that Pennzoil Platinum at $11 a jug! That's a steal. Then take the receipt and get a $22 Shell gas card rebate, too, making them free!

Oh, and my JK will use 11 quarts in a 6k oil change interval. It has a drinking problem, so I usually wind up pouring whatever is laying around and looking lonely down its hatch. Lol! It still runs like new, though!

 

[DanW]

Hey, one other thing for all to know, if you didn't already. If a dealer or oil change shop ever puts 6 quarts in your 3.6, it'll be ok. My Pentastar engineer friend told me that all FCA engines are certified to pass all of their tests either a full quart low or a full quart overfilled.

That is unless you get at extreme angles off road where the 3.6 starts laying down a smoke screen like a WWII destroyer. But even then, while visually and audibly dramatic, it doesn't cause any permanent damage. Even with 5 quarts it will do it, but it'll do it at less of an angle with 6. But I've been at some pretty good angles in my JL and I haven't experienced it. But it is a well known thing with the 3.6.

 

[ACAD_Cowboy]

Hey, one other thing for all to know, if you didn't already. If a dealer or oil change shop ever puts 6 quarts in your 3.6, it'll be ok. My Pentastar engineer friend told me that all FCA engines are certified to pass all of their tests either a full quart low or a full quart overfilled.

That is unless you get at extreme angles off road where the 3.6 starts laying down a smoke screen like a WWII destroyer. But even then, while visually and audibly dramatic, it doesn't cause any permanent damage. Even with 5 quarts it will do it, but it'll do it at less of an angle with 6. But I've been at some pretty good angles in my JL and I haven't experienced it. But it is a well known thing with the 3.6.

I've been at very extreme angles and never had it smoke. I have however seen it eat what I thought was too much oil only to find it is not just within spec but in the middle of the range of acceptable for high rpm use. Kooky little engine.

 

[DanW]

I've been at very extreme angles and never had it smoke. I have however seen it eat what I thought was too much oil only to find it is not just within spec but in the middle of the range of acceptable for high rpm use. Kooky little engine.

Yeah, I think you have to be at EXTREME angles, but they do smoke. Litebright @Kevin8086 had his do it in one of their videos and I've seen it once on the trail in a JK Pentastar. My friend confirmed that it is a thing and explained it to me, but I can't remember the details. It is a very specific mechanical reason for it. He also said they did LOTS of testing on it at FCA and found it not to cause harm unless at an angle that would certainly be a rollover angle for an extended period of time.

It's not something I'd lose sleep over, except that if you are 1 quart over full, it makes it more likely to do it. That's really the only reason I mentioned it.

 

[ACAD_Cowboy]

Oh no, drag the piston skirts of any engine through the oil and it'll smoke sitting right side up.

But good to know they tested it in "normal use parameters" that reflect reality. I have a buddy with a big name power tool company and to prove a point one of the engineers called a contractor and paid him to put a box on his truck, dont open it or look but just leave it in the utility body all winter and we will see you in the spring. Seems most cordless tools don't like aggressive freeze thaw cycles and being bumped all over hell and creation. The test was to prove this to some desk engineers who felt their test cell data was fine. It was not and sadly the contents of the box bore this out.

 

[DanW]

Oh no, drag the piston skirts of any engine through the oil and it'll smoke sitting right side up.

But good to know they tested it in "normal use parameters" that reflect reality. I have a buddy with a big name power tool company and to prove a point one of the engineers called a contractor and paid him to put a box on his truck, dont open it or look but just leave it in the utility body all winter and we will see you in the spring. Seems most cordless tools don't like aggressive freeze thaw cycles and being bumped all over hell and creation. The test was to prove this to some desk engineers who felt their test cell data was fine. It was not and sadly the contents of the box bore this out.

Lol, that's great!

But the oil smoke doesn't have anything to do with the pistons dragging in it. The issue as at the top of the engine, not the bottom. It has to do with oil pooling in one end of the valve train and overwhelming a device that is like an oil pump, I believe at the driver side rear of the head. Ultimately, the oil gets into the left rear vavles and burns off. That's about as much detail as I can get into without getting something wrong. But my friend drives a Pentastar every day and some of the guys who investigated this are Jeepers with Pentastar powered Jeeps. They live what they do.

It is said by some that a catch can help with this, but some with cans have said they do not.

I've not heard of anyone damaging an engine from it. Litebrite did wind up blowing their Pentastar, but it had a supercharger on it and ran it wild in other ways. I think they had cranked up the boost, too, beyond the vendor's recommendation. They wanted a Hemi. So I think they were trying to see what it could take.

 

[TYJ]

ALL “oil threads” on ALL FORUMS should be banned.

 

[Mark Doiron]

Hey, one other thing for all to know, if you didn't already. If a dealer or oil change shop ever puts 6 quarts in your 3.6, it'll be ok. My Pentastar engineer friend told me that all FCA engines are certified to pass all of their tests either a full quart low or a full quart overfilled.

That is unless you get at extreme angles off road where the 3.6 starts laying down a smoke screen like a WWII destroyer. But even then, while visually and audibly dramatic, it doesn't cause any permanent damage. Even with 5 quarts it will do it, but it'll do it at less of an angle with 6. But I've been at some pretty good angles in my JL and I haven't experienced it. But it is a well known thing with the 3.6.

The liquid I've found a problem with at extreme angles is the coolant in my 2007 JK. I've found it best to not fill it any higher than the min line when cool. Fill it higher, and when it's hot and you're at an extreme angle, you'll end up looking for where you're leaking coolant--and it's just the reservoir overflow making a big mess.

But on this topic of overfilling things, I've found it best to not let shops refill anything--any liquids or tire pressures. They have no clue when it comes to oversized tires. And my JK differentials will dump lube out into the lines that connect them to the air filter housing/snorkel if they fill them up to the fill ports on the aftermarket covers. So when I drop it off for a recall or whatever, I instruct them, "Don't touch the fluids or tire pressures!"

 

[Mark Doiron]

Because we still have JK to worry about?

I just skimmed the JT mqnuql, I wonder if they took a quart out for windage in a vain attempt to squeeze just a hair more mpg out. Given all the hay the engineers made about cooling you would think increased capacity with a honking big cooler would have been on order.

Yeah, that six quarts in the JK 3.6 vs the five in the JT is why I asked the question. Trying to bring it to folks' attention in a kind way.

 

[ACAD_Cowboy]

So Mark, I gather then that you don't suddenly owning an oil bath air filter?

Oiled fiber air filters with too much oil were a great source of income for me way back. It's amazing how little oil it takes to kill a very expensive air flow meter or foul a finicky carburetor.

 

[DanW]

ALL “oil threads” on ALL FORUMS should be banned.

So no oil threads on an automotive forum? Ok, that seems reasonable.

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