Oil change

[seanmh72]

Yeah it says 5.7 quarts but I have never put more then 5 in. Measure what you pull out, put in 5 and check it. Mileage will vary I guess.

Guess the engine expands and contracts up to 3/4 of a quart?

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[Rvalas]

Guess the engine expands and contracts up to 3/4 of a quart?

Can't get one by you can we.

 

[ShadowsPapa]

Does no one read the MANUAL any more? That online chart even shows a different coolant capacity. Something is wrong with that chart, or, they are basing oil capacity on a dry vehicle that's never had oil in it and that .7 is what the cooler and lines hold. That's the only way 5.7 could be right.

5 is what it takes for a change with filter.

 

[seanmh72]

Does no one read the MANUAL any more? That online chart even shows a different coolant capacity. Something is wrong with that chart, or, they are basing oil capacity on a dry vehicle that's never had oil in it and that .7 is what the cooler and lines hold. That's the only way 5.7 could be right.

5 is what it takes for a change with filter.

So you’re guessing? Thanks!

 

[ShadowsPapa]

So you’re guessing? Thanks!

Guessing at what?
I'm speculating on why that chart is so wrong based on past experiences.

That other chart is different on cooling system capacities as well. It appears to be a copy and paste from spec sheets for other Jeep models.

The "capacity" of the crankcase when changing oil and filter is 5 quarts. No guessing. Jeep even had communications to dealers on the topic.

When 5 quarts is added, oil comes up to the full mark on the dipstick of my engine. When over 5 quarts is added, it's obviously over-filled based on the stick.

 

[seanmh72]

Guessing at what?
I'm speculating on why that chart is so wrong based on past experiences.

That other chart is different on cooling system capacities as well. It appears to be a copy and paste from spec sheets for other Jeep models.

The "capacity" of the crankcase when changing oil and filter is 5 quarts. No guessing. Jeep even had communications to dealers on the topic.

When 5 quarts is added, oil comes up to the full mark on the dipstick of my engine. When over 5 quarts is added, it's obviously over-filled based on the stick.

What does the cooling system have to do with the oil capacity?

And a synonym for speculating is guessing….

 

[Hootbro]

Guess the engine expands and contracts up to 3/4 of a quart?

It is either a typo or a dry engine fill capacity from the factory spec.

Owners manual and even the Chrysler Tech Authority the dealerships use for reference lists 5.0 quarts as stated capacity when servicing.

5.7 is too much for a in service oil fill. I have noticed also what others have already mentioned is to wait 10-15 minutes after a 5.0 quart oil change before checking level. I am on my third vehicle with the Gen 3 Upgrade Pentastar with probably easily 10 oil changes between them and they all took 5.0 quarts.

 

[ShadowsPapa]

What does the cooling system have to do with the oil capacity?

And a synonym for speculating is guessing….

Looks like there's a lack of critical thinking there.
The coolant chart has a lot to do with it because it shows a pattern of errors in that document.

And no, it's a theory based on my pattern recognition abilities, and decades of experience with this exact sort of thing. I also use a greater degree of perceptual reasoning than most.

I've also messed with some of their incorrect numbers and found that if using rounded numbers, those fit the metric system capacities for Grand Cherokee. So there's another possible explanation.

But seriously, and I've seen this before, where factory specs get out into consumer documents, especially in cases where there are external lines and coolers involved.
If you compare what a 1975 Ford truck with C6 holds in the transmission and converter for a change compared to the total capacity dry - this starts to make some sense.

In any case, I am amused that to this day, years after the introduction of the modified 3.6 in the Gladiator, there's any discussion at all on oil capacity in the case of oil and filter change.
People are over-thinking it. It's clear in the OM, it's clear in the STAR communications to dealerships - the oil capacity in the case of an oil and oil filter change is 5 quarts. The pan was made smaller and lighter, among other changes.
The talk of measuring what comes out and putting the same amount back in is also amusing. What comes out isn't necessarily what it started with due to multiple factors - natural oil consumption (which includes burning and vaporization and PCV operation) and natural increases through combustion products entering the crankcase. And unless you use a spatula to scrape every drop of oil film off the container you drained it into, you'll likely miss.

Drain it, change the filter, put 5 quarts back in and be done with it.
That's the process used for longer than I've been alive and yet - there's still doubt that it's good enough?

Between Hootbro and I, we have provided 3 documents supporting 5 quarts - two of them from FCA tech, one the owners manual, plus the fact that if you put more than 5 in, it's over-filled on the stick.

This is so very simple but is still talked about 3 years after this truck was introduced.

 

[Phred]

Page 320 in manual.

The engine oil level should be checked five minutes after a warmed up engine has been shut off.

 

[ShadowsPapa]

Page 320 in manual.

The engine oil level should be checked five minutes after a warmed up engine has been shut off.

Does no one read the MANUAL any more?

 

[MikeyK]

Does no one read the MANUAL any more? That online chart even shows a different coolant capacity. Something is wrong with that chart, or, they are basing oil capacity on a dry vehicle that's never had oil in it and that .7 is what the cooler and lines hold. That's the only way 5.7 could be right.

5 is what it takes for a change with filter.

Thanks for the reassurance! At the very least, it makes buying 5 quarts a lot easier than trying to figure out the best way to make multiples of 5.7 work. Even 5.5 would be easier. And yes, I do teach math ? ?

 

[Gregory L. Kilbourne]

The engine oil capacity of a Jeep 3.6 is 5.0 quarts of engine oil. Jeep recommends using SAE 5W-20 motor oil in the Jeep Gladiator. Jeep also recommends changing the oil every 7,500 miles or 6 months, whichever comes first.

 

[Hootbro]

The engine oil capacity of a Jeep 3.6 is 5.0 quarts of engine oil. Jeep recommends using SAE 5W-20 motor oil in the Jeep Gladiator. Jeep also recommends changing the oil every 7,500 miles or 6 months, whichever comes first.

You got the 5 quarts right. Everything else is contrary to the owners manual which recommends 0W-20 oil and to follow the OLM for change interval and not to exceed 10K miles or 12 months in service.

You might be confusing some of the JK spec for oil changes and the previous generation 3.6L

 

[abe57]

The engine oil capacity of a Jeep 3.6 is 5.0 quarts of engine oil. Jeep recommends using SAE 5W-20 motor oil in the Jeep Gladiator. Jeep also recommends changing the oil every 7,500 miles or 6 months, whichever comes first.

Nope sorry it shows on my 2021 on the oil filler cap and manual to use SAE 0w20

 

[WILDHOBO]

Just make sure you are on level ground and give a couple minutes after you turn off

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