Ditch the 0w-20 before its too late.

[travis304]

because we are talking hair splitting number. Also you need a good heat soak to see it.

He needs to reach 375 for 30 minutes, then the magic happens. Add salt to taste.

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[GW’s JL]

Guys, why hasn't my oil temperature changed with 0W-40? I don't get this. Is it because my Jeep is doing a fantastic job of keeping the temperature in check? I don't understand this, what's going on? I can absolutely not tell if I'm running a heavier oil. I will crawl a mountain this weekend to see how things look up there

Because any heat due to a viscosity increase is almost undetectable. It’s blown way out of proportion by some.

 

[Jeep Junkie]

Because any heat due to a viscosity increase is almost undetectable. It’s blown way out of proportion by some.

Hey, looks like even that "thick oil gets warm faster" is blown out of proportion, because I don't feel it, it still takes ages to get to 190 degrees

 

[Jeep Junkie]

Sent my question to Motor Oil Geek It is probably AI that will reply

 

[Jeep Junkie]

Guys, if VVT, as some claim, requires 0w20 then how come my engine on 0w40 is not giving a sign like throwing a code?

 

[GW’s JL]

Guys, if VVT, as some claim, requires 0w20 then how come my engine on 0w40 is not giving a sign like throwing a code?

VVT is designed to work properly in a wide range of viscosities. That way it works at all oil temperatures from Alaska to Death Valley.

 

[Jeep Junkie]

VVT is designed to work properly in a wide range of viscosities. That way it works at all oil temperatures from Alaska to Death Valley.

Makes sense. 0W-20 in Alaska winter is much thicker than 0W-40 in Arizona summer, -20f compared to 110f

 

[jeepingib]

Guys, if VVT, as some claim, requires 0w20 then how come my engine on 0w40 is not giving a sign like throwing a code?

Besides the fact that this oil is still operating in the expected range of viscosity for this engine. You should not expect to see the ECM throw codes for much that is oil viscosity related. There are only two sensors that are even related to oil. An oil pressure sensor, and an oil temperature sensor. And I believe they are both mounted by the oil cooler. There may be an additional set elsewhere, but the system doesn't have a ton of sensors in various locations to sense oil pressure changes in the heads, vs bearings etc. As long as it sees parameters on those sensors that fall within the range it is expected to see, you won't get any codes.

 

[Pape]

Guys, if VVT, as some claim, requires 0w20 then how come my engine on 0w40 is not giving a sign like throwing a code?

Is VVT work when your JL is cold on 0w20 ?
if yes it will work with 0w40.
remember sliding window

 

[Jeep Junkie]

Besides the fact that this oil is still operating in the expected range of viscosity for this engine. You should not expect to see the ECM throw codes for much that is oil viscosity related. There are only two sensors that are even related to oil. An oil pressure sensor, and an oil temperature sensor. And I believe they are both mounted by the oil cooler. There may be an additional set elsewhere, but the system doesn't have a ton of sensors in various locations to sense oil pressure changes in the heads, vs bearings etc. As long as it sees parameters on those sensors that fall within the range it is expected to see, you won't get any codes.

Is VVT work when your JL is cold on 0w20 ?
if yes it will work with 0w40.
remember sliding window

Thanks

 

[Jeep Junkie]

I feel like a lot of things are blown out of proportion when it comes to thick oil, like very significant drop in gas mileage, change in oil pressure , very significant loss of power, and significant increase of heat. I'm not feeling anything different. And some people claim that their engine makes less noise on thick oil, I have not experienced that either, my engine sounds just like before

 

[Jeep Junkie]

I think lowering your tire pressure by 5 PSI will make your Jeep way less zippy than using 20w60 oil

 

[UncleJimmy]

In other news, when are you going to start worrying about you diff oil? lol!

Do you have lockers? You know the JL reduced the viscosity and capacity of the rear diff gear oil by about 25% right? And some users are frying the locker electronics in the diff, some of which if they go bad you have to get a whole new axle.

See my thread below:

https://www.jlwranglerforums.com/fo...ge-your-rear-diff-at-5k-mi-if-you-tow.159914/

 

[Jeep Junkie]

In other news, when are you going to start worrying about you diff oil? lol!

See my thread below:

https://www.jlwranglerforums.com/fo...ge-your-rear-diff-at-5k-mi-if-you-tow.159914/

Sir, where have you been, long time no see

 

[UncleJimmy]

Sir, where have you been, long time no see

Researching more FCA/Stellantis/CAFE design influences for the Wrangler.

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