Any 3.6L JL Wrangler owners here?

[Motor oil rookie]

When I'm crawling mountain trails in the summer heat, I need an oil that flows fast and gets rid of the heat

 

[Motor oil rookie]

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.

Yep

 

[Glenda W.]

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.

So what happens in the winter when my coolant temp is 190 and my oil temp is 200? In the summer my coolant temp is still 190 but oil temps are 240+. There’s no viscosity assumption going on. Engines have to be designed to operate correctly at huge viscosity swings.

 

[Glenda W.]

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.

Wut? I don’t even know where to start with this. You truly are a motor oil rookie. Good thing you found BITOG. Just forget what you learned elsewhere online.

 

[Motor oil rookie]

So what happens in the winter when my coolant temp is 190 and my oil temp is 200? In the summer my coolant temp is still 190 but oil temps are 240+. There’s no viscosity assumption going on. Engines have to be designed to operate correctly at huge viscosity swings.

if you have the right viscosity, nothing happens. Jeep will assume the exact behavior of the oil and it's assumptions will be 100% correct. These modern systems are very complicated, there are tons of If's and Then's done when you simply push the start button. We're driving computers

 

[Glenda W.]

if you have the right viscosity, nothing happens. Jeep will assume the exact behavior of the oil and it's assumptions will be 100% correct. These modern systems are very complicated, there are tons of If's and Then's done when you simply push the start button. We're driving computers

Internet myths.

 

[wings&wheels]

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.

Hot? Really? Comparing drain back to pressurized flow?

No....

 

[Motor oil rookie]

Hot? Really?

No....

Try it, you will be suprised how much extra time 0W-40 will take to completely get to the oil pan.

 

[Motor oil rookie]

I code for a living and I know for a fact modern engines have software in them. And I can't believe oil viscosity is not a parameter in that software. If an engine supports multiple grades then awesome, the system will know how to deal with variations. But my 3.6L does not support multiple viscosities. It will assume the 0W-20 is in there and will do all calculations according to that. And just like a messed speedometer, the engine internals will act all over the place.

 

[Glenda W.]

I code for a living and I know for a fact modern engines have software in them. And I can't believe oil viscosity is not a parameter in that software. If an engine supports multiple grades then awesome, the system will know how to deal with variations. But my 3.6L does not support multiple viscosities. It will assume the 0W-20 is in there and will do all calculations according to that. And just like a messed speedometer, the engine internals will act all over the place.

I’m going to step away from this thread. You have been feed a bunch of misinformation elsewhere. I wouldn’t spread to much misinformation here as some will not be as nice as me. You picked some great oils that will serve you well.

 

[Motor oil rookie]

I’m going to step away from this thread. You have been feed a bunch of misinformation elsewhere. I wouldn’t spread to much misinformation here as some will not be as nice as me. You picked some great oils that will serve you well.

No, it was my own experiment. Thicker oil was too slow to get to the oil pan and I freaked out. That kind of pace will disturb all calculations.

 

[D60]

Laugh or cry -- I just can't decide which way to go????

 

[wings&wheels]

Laugh or cry -- I just can't decide which way to go????

I know, I'm almost tempted to ask.....almost

 

[HoosierJeeper]

Here's mine, 18 JLU Sahara with the 3.6. 106k on it now, used to run Pennzoil Platinum 0w20 HM, but couldn't find that last oil change so I got Valvoline EP HM 0w20. Always a mopar filter.

 

[4WD]

Here's mine, 18 JLU Sahara with the 3.6. 106k on it now, used to run Pennzoil Platinum 0w20 HM, but couldn't find that last oil change so I got Valvoline EP HM 0w20. Always a mopar filter.

View attachment 279396

View attachment 279397

Awesome - Love the paint - but just too darn hot down south …

 

[HoosierJeeper]

Awesome - Love the paint - but just too darn hot down south …

Thanks, I'm always a sucker for black on tan (wish I got more than tan seats tho!). Yours is sharp too! Yup, it'd be pretty hot down there for sure, white is the way to go down south.