Any 3.6L JL Wrangler owners here?

[Motor oil rookie]

My mechanic said Red Line 0W-20 starts very viscous for its grade, and keeps that viscosity more than others over time, so it is good for my Jeep that goes offroad a lot and sees high oil temperatures.
Yesterday I was on the mountains and my oil temperature stayed at 228 degrees for a good 20 minutes. I was curious to see how high it went and didn't turn my fan on. I am happy I have a good premium oil in my Jeep.

 

[Motor oil rookie]

My mechanic is in his 50's and Jeeps is all he does, including engine rebuilds and engine swaps. He has a JK and uses Mobil 1 Extended Performance 5W-30. He says Red Line is too expensive But he told me to stick to 0W-20 till you are out of warranty.

He has a small business with not many annoying formalities. I get to be there when he is working on my Jeep. He put so much care and time in changing my gear oil. I love small businesses.

 

[Randol]

Not a JL, but a JK, same engine. Valvoline synthetic 5W-30 and Mopar filters all it's life, it's at around 70K miles.
The main thing is to not overtighten the filter housing. The way the Oring seals, tight does nothing for you, turn until it bottoms out and stop.

 

[Motor oil rookie]

Ordered some of this. It doesn't shear, infact it thickens a little bit with use. Will be using this after Red Line.

 

[Motor oil rookie]

Not a JL, but a JK, same engine. Valvoline synthetic 5W-30 and Mopar filters all it's life, it's at around 70K miles.
The main thing is to not overtighten the filter housing. The way the Oring seals, tight does nothing for you, turn until it bottoms out and stop.

It is technically not the same engine. Yours is the 3.6 from the current Chargers. JL 3.6 is the upgraded one that has totally different valvetrain. 0W-20 is what it takes across the whole world.
5W-30 could be problematic in JL 3.6

 

[Glenda W.]

It is technically not the same engine. Yours is the 3.6 from the current Chargers. JL 3.6 is the upgraded one that has totally different valvetrain. 0W-20 is what it takes across the whole world.
5W-30 could be problematic in JL 3.6

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Lots of baloney in there. Sorry but that tech has no idea about viscosity in different temp ranges. Plenty of 0w20’s being run that are in a 30 grade range. Many even run 40 grades.

 

[D60]

Lots of baloney in there. Sorry but that tech has no idea about viscosity in different temp ranges. Plenty of 0w20’s being run that are in a 30 grade range. Many even run 40 grades.

The only Facebook regurgitated garbage was the typical "designed with small holes only for 0W20" nonsense. That is the myth everyone reads and perpetuates.

 

[Motor oil rookie]

The only Facebook regurgitated garbage was the typical "designed with small holes only for 0W20" nonsense. That is the myth everyone reads and perpetuates.

What happens when you mount bigger tires and you don't make changes to the Jeep's computer? A lot of things get messed up, like your speedometer, odometer, transmission shift points. Similarly, when the oil temperature is 190°, Jeep expects it to be of a certain viscosity, and 5W-30 is not that viscosity at that temperature. A lot could get messed up because of that miscalculation. Oil is not just a lubricant in these modern engines, it has other functions as well. And for those functions, Jeep must have an exact idea of the viscosity at a certain temperature

 

[Glenda W.]

What happens when you mount bigger tires and you don't make changes to the Jeep's computer? A lot of things get messed up, like your speedometer, odometer, transmission shift points. Similarly, when the oil temperature is 190°, Jeep expects it to be of a certain viscosity, and 5W-30 is not that viscosity at that temperature. A lot could get messed up because of that miscalculation. Oil is not just a lubricant in these modern engines, it has other functions as well. And for those functions, Jeep must have an exact idea of the viscosity at a certain temperature

Guess you better dump your Redline and return your HPL. Oh and don’t drive in cold climate.

 

[Motor oil rookie]

Guess you better dump your Redline and return your HPL. Oh and don’t drive in cold climate.

Upto 9.3 is considered 0W-20, Jeep computer should know that. Red Line should go below 9, and I will drain the HPL out before it goes above 9.3. The journey of HPL from 8.5 to 9.3 will not be a short one

 

[Glenda W.]

Upto 9.3 is considered 0W-20, Jeep computer should know that. Red Line should go below 9, and I will drain the HPL out before it goes above 9.3

All internet myths(computer sensitive to different viscosity). Oil viscosity at different temps is highly misunderstood. Even I underestimated it until I got a vehicle with an oil temp gauge.

 

[Motor oil rookie]

All internet myths(computer sensitive to different viscosity). Oil viscosity at different temps is highly misunderstood. Even I underestimated it until I got a vehicle with an oil temp gauge.

In today's engines, oil is also a hydraulic fluid. I won't mess around with the recommended viscosity. But it is just me.

 

[Motor oil rookie]

The Ram ProMaster 3.6 L Pentastar that made it to 600,000 miles, used 20 grade oil. My Jeep will also be fine on 20 grade oil. I will just use really good premium quality oil.

 

[wings&wheels]

So if the oil has to be "thin enough....tight internals", what about cold starts and short trips?

 

[Glenda W.]

In today's engines, oil is also a hydraulic fluid. I won't mess around with the recommended viscosity. But it is just me.

The Ram ProMaster 3.6 L Pentastar that made it to 600,000 miles, used 20 grade oil. My Jeep will also be fine on 20 grade oil. I will just use really good premium quality oil.

That’s your call and I would never make someone do something they’re not comfortable with. I just want to make sure you’re not spreading myths or misinformation. Oil’s viscosity is constantly changing with temperature. An engine can’t be viscosity sensitive or Alaska and Death Valley folks would be in serious trouble.

 

[Motor oil rookie]

So if the oil has to be "thin enough....tight internals", what about cold starts and short trips?

No it's not about that. It's about the operating temperature where you will confuse the system with a higher viscosity. It's like confusing the Jeep with bigger tires. But with bigger tires, you can get into the program and change it to accommodate bigger tires. But what can you do about letting the Jeep system know that you're using higher viscosity oil? When your oil temperature is 190° for example, Jeep will assume the oil's viscosity and its assumption will be wrong. Nowhere on the planet Jeep recommend's anything other than 0W-20.

 

[wings&wheels]

Please explain "confuse the system"? What system? There really isn't any analogy between larger diameter tires and oil viscosity.

 

[Motor oil rookie]

It's not about thick oil not fitting into smaller holes, it is about thick oil changing Jeep's behavior. Modern engines use oil for other stuff too, not just lubrication. There are so many things going on these days, variable compression, variable valve and all. And those things use the oil to decide what to do

 

[Motor oil rookie]

Please explain "confuse the system"? What system? There really isn't any analogy between larger diameter tires and oil viscosity.

Okay do this experiment. Next time check your oil level when you have 0W-20, and note the time it takes to get a full reading on the dipstick. Next use 0W-40 and then do the same thing. And then watch the time difference. It will take a good extra 15 minutes for the 0W-40 to get to the oil pan. No thank you, that kind of flow will kill my engine in the long run.

 

[Fordiesel69]

After you iron out your oil and filter selection, make sure to run the interval to 5k or 6k max. Do not extend the drain intervals on these engines.