Oil - going from 0w20 to 0w40

[ShadowsPapa]

Yep sure am mom had firey red hair. !!

Beware of those - and German women.

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[Minty JL]

Yeah, we have a GM person here, a Jeep/FCA person here, and likely others who work in shops and dealerships - they are more in the know than some of the guesses where the "theory" comes from lack of even touching a camshaft.
There's a lot of valuable stuff from informed people.

For sure. I have no problem being humble and continuing to learn.

But I will say, my 3.6 seems happier with the Mobile 1 0w40 with about 10oz of Marvels mystery oil in it. Oils temps are the same...but start up and revving the pis out of it feels better......again all subjective at this point.

 

[ShadowsPapa]

I mean I been around this forum for à good dang while . The oil threads are the gift that just keeps on giving endless entertainment and some of the posters you couldn't chase them away from their opinions no logic at all.

And all hell broke loose when GM came out with their recall for the crappy crankshaft finish - "AHA! There's PROOF it's the viscosity!" .....while they totally miss the real points of the videos, don't see the pattern. or understand oils need to vary based on engine surface finishes and more.

 

[AdamC149]

Where did you get the idea there is Teflon?

I keep seeing this teflon coating being mentioned in regards to the rollers for the camshaft however I have not confirmed this for myself.
I will be relieved to hear if this is inaccurate. I would trust you and some others would know more than me about that.

I did have a 3.6l in a Durango and was very pleased with it. No issues to speak of for the 170k miles I put on it. It was a 2017 and I imagine not quite the same engine we have today.

 

[Charles 236]

I keep seeing this teflon coating being mentioned in regards to the rollers for the camshaft however I have not confirmed this for myself.
I will be relieved to hear if this is inaccurate. I would trust you and some others would know more than me about that.

I did have a 3.6l in a Durango and was very pleased with it. No issues to speak of for the 170k miles I put on it. It was a 2017 and I imagine not quite the same engine we have today.

The 2017 Durango 3.6 is essentially the same as the Gladiator PUG engine. Only visible difference is the intake manifold is over the right valve cover instead of the left valve cover as in the Gladiator. The tune in the PCM is specific to each model. But other than that there are no appreciable differences between the two engines.

As for Teflon or other coatings, only on the plain bearings in the bottom end of the engine. The high lift rockers are hardened, not coated. There is no Teflon coating on any of the valvetrain components, nor would a plastic coating have the durability for valvetrain use.

 

[Stan H]

And a fellow tech/grease monkeys input is valued. I'm almost 46........I'm past the days of ego and pissing contest. BUT we collectively provide valid insight to the community

Totally agree with that , why just the other day I learned about the clutch in the alternator pulley( didn't know) and the knock sensor( didn't know or have idea where it was located ) lol

 

[ShadowsPapa]

I keep seeing this teflon coating being mentioned in regards to the rollers for the camshaft however I have not confirmed this for myself.
I will be relieved to hear if this is inaccurate. I would trust you and some others would know more than me about that.

I did have a 3.6l in a Durango and was very pleased with it. No issues to speak of for the 170k miles I put on it. It was a 2017 and I imagine not quite the same engine we have today.

Be careful what you read on the internet in forums. No Teflon

 

[ShadowsPapa]

Totally agree with that , why just the other day I learned about the clutch in the alternator pulley( didn't know) and the knock sensor( didn't know or have idea where it was located ) lol

The knock sensor mentioned was for the GM engine if that's what I think you are referring to. He's a GM/Chevy person referring to checking those engines

 

[Stan H]

The knock sensor mentioned was for the GM engine if that's what I think you are referring to. He's a GM/Chevy person referring to checking those engines

No I believe it is the one on the 3.6Pug
https://parts.allmoparparts.com/oem...0b3ImeT0yMDIxJnQ9cnViaWNvbiZlPTMtNmwtdjYtZ2Fz

 

[Matt F]

Ok, this going to be a highly debated thread for numerous reasons and I get it. Yes, I have always been an advocate for using what the manufacturer states. BUT it seems both Jeep and GM have screwed the pooch on this topic.

First, the 3.6 only on bank 2 the cam getting chewed up by the rockers once the Teflon coating wears away the damage begins as we know......why is this issue not an issue on the other 3 cams and rockers. Analysis would lead me to believe poor oiling or pressure.

Second case point, the recent recall on all GM vehicles equipped with the LT based 6.2 why is this relevant to Jeep and the 3.6.......both from the factory use 0w20 oil. I have watched hours of video from professional technicians and read several articles on the diagnosis procedures.

GMs diagnostic procedure to determine an issue or immenant engine failure is scanning for the Crank to Cam timing/correlation, if exceeds a specified threshold......engine replacement if it hasn't already failed. IF the values are within specification........drain engine oil, replace filter and fill with 0w40. Yes, that's the fix and is how ship now right off the assembly line.

So.......I will be a test monkey and I'm switching to 0w40 with today's oil change. Anything I can do to prolong engine life is a win with these 3.6s.......and there is currently a national back order on the cams with dealers saying 6 to 8 weeks.

Call me dumb, damn that's a good idea or state an educated or well articulated thought.

i got what you're saying but the enginners of jeep have being doing a lot of work at this topic , i understand what's gonna happen at some point would be bring the small parts washers cams to being produced here ,a big part of jeep inline 70 per cent it's at Ohio but the motor part and small components are made in different locations where the quality control it's failing like powertrains arms , camshafts they are very aware of this problem , now a lot of owners are waiting for arms and camshafts around Usa , about chevy they get proactive gonna bring the new v8 all to be assembled in buffalo New york in 2026 , and Ram it's bringging back the Hemi 5.7 to 1500 , if you plan to change the weight of your oil wait till the warranty expires.

 

[ShadowsPapa]

No I believe it is the one on the 3.6Pug
https://parts.allmoparparts.com/oem...0b3ImeT0yMDIxJnQ9cnViaWNvbiZlPTMtNmwtdjYtZ2Fz

I was referring to the post yesterday where the guy talked about diagnosing an engine using that point.
All engines for Jeep vehicles have had knock sensors since at least the 90s

 

[Stan H]

I was referring to the post yesterday where the guy talked about diagnosing an engine using that point.
All engines for Jeep vehicles have had knock sensors since at least the 90s

Lol oops

 

[PSO]

https://bobistheoilguy.com/forums/threads/gm-aborting-move-to-0w-40.395438/

If you notice, he said the EPA got a little POed at the 40W, and GM went back to 20W as the rest of the world was always using 40W.

 

[Hootbro]

If you notice, he said the EPA got a little POed at the 40W, and went back to 20W as the rest of the world was using 40W.

I like Rainman Ray's Repairs, but he sometimes gets a bit off on the finer details and just repeats a lot of internet hearsay.

 

[ShadowsPapa]

If you notice, he said the EPA got a little POed at the 40W, and went back to 20W as the rest of the world was using 40W.

Epa doesn't get involved later. What a lot of internet speculation, little fact

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