Anyone use 0w30 or 5w30

[dayusmc]

Wondering if anyone uses 0w30 or 5w30 fully synthetic oil in there 3.6 gas jeeps. Or is everyone using 0w20.

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[Hootbro]

I have run 0W-30 in my Gladiator and 5W-30 in my 2018 Wrangler JL with no discernible issue.

That being said, I have had just as good results running the 0W-20.

 

[dayusmc]

Thank you for your post!
I just put 5w30 Amsoil in my gladiator because I had bought a couple cases of it for a different vehicle. Once that is used up I was going to switch to 0w30.

 

[ShadowsPapa]

There's also multiple threads on this very topic and the end result of many pages of "discussion" is pretty much what Hootbro said.

Frankly, I've not yet seen a valid reason that someone can SUPPORT for not using the recommended oil.

The viscosities/weights mentioned are so close to each other, and a lot should depend on where you live and the typical climate there - temperatures, and really nothing more. Go from 20 to 30 in how climates, etc. but for most there's no valid or supportable reason to second-guess millions of miles of success (I believe they hit the 3 million built mark on the 3.6)

 

[dayusmc]

I looked in this forum sub section, but didn't see any posts on it. Maybe I am looking in the wrong sub section.
Unfortunately trying to navigate the forum on the browser on my phone is a little hard. I wish the forum had a tapatalk plugin.

 

[Hootbro]

Thank you for your post!
I just put 5w30 Amsoil in my gladiator because I had bought a couple cases of it for a different vehicle. Once that is used up I was going to switch to 0w30.

Oil and oil grade is a sensitive subject around here. Many will tell you anything other than what the owners manual says is wrong but there really is no data to suggest anything catastrophic will happen when using a XW- 30 grade oil in these engines.

Only caveat is if you have a warranty claim to submit for your engine and proof of oil changes is required, there "may" be push back by a dealer to try and deny warranty without proving your incorrect grade of oil used was the actual culprit of the failure. Sticking with the OM recommended 0W-20 grade removes that card being played by the dealership.

I am like you though in that I have found myself with the odd amount of XW-30 grade oil laying around and do not sweat putting it in for the occasional oil change fill from time to time.

 

[ATL_Rubi]

Did the jeeps first oil change over the weekend, the counter guy at Autozone questioned why 0w20 instead of the other weights, simple answer, I don't want to give jeep any reason at all to deny a warranty claim *should* anything go wrong. Can they definitively tell what weight i used if it's used? i dont know, but not going to run that risk after chewing through two 3.8 blocks due to oil issues on Jeeps end.

 

[dayusmc]

I bought my Gladiator with 37,000 miles on it. So I think it is out of warranty.
I had an issue with my wife's BMW using the 5w20 oil that it called for. It was burning oil. I went to 5w30 and it runs great on it.
I didn't think there would be any issue going to 5w30 or 0w30 in the Jeep. I wouldn't put 10w30 in it or anything thicker than 5w30 in it just for personal preference. I know other people do, and I think that is fine.
I don't sweat the oil brand thing, everyone has their preference. Just like I married a blond and my best friend married a brunette, just personal preference- and I always respect everyone's personal preference...

 

[ShadowsPapa]

Did the jeeps first oil change over the weekend, the counter guy at Autozone questioned why 0w20 instead of the other weights, simple answer, I don't want to give jeep any reason at all to deny a warranty claim *should* anything go wrong. Can they definitively tell what weight i used if it's used? i dont know, but not going to run that risk after chewing through two 3.8 blocks due to oil issues on Jeeps end.

Naw, they aren't going to be able to tell on used oil.

I'm with Hootbro on this - I'll stick to the book but if I had a case of Amsoil that was just a number off on either end, I'd not sweat using it. It would maybe depend in the season I was going to here in Iowa, but if it's 5 instead of 0 or 30 instead of 20, it's not going to cause catastrophic damage.
Since I buy oil for the vehicles I have, I buy what I know works or what the book says. I see no reason not to. But if I had some from another vehicle or another reason and it was that close, I'd use it.

A SLIGHT change, say from 20 to 30 on the top end, could MAYBE quiet a valve train down a bit.

Pay attention to your engine - if things don't sound right, then move back. If all sounds and feels well, especially with a single weight or viscosity change, probably fine.

I'm a by the book person quite often, especially when under warranty, but know after all of these years that a minor change like that isn't going to cause mega-issues.
Face it - oil viscosities change with age and use anyway! Age, wear, contamination, all work against the oil to change its properties. 0w20 going in won't behave as 0w20 coming out after 6,000 miles.

 

[dayusmc]

I also know from years of doing motocross suspension, one manufacturer's 5w was equal to anothers 3w.
They all vary a little in pour test.
I actually bought a couple cases of the amsoil for my Tacoma, the 5w20 left the valves making too much noise. I bought the 5w30 to quite it down and it did.
I have been using that since the truck had 10,000 on it. It is at 90,000 now and never had a problem

 

[ShadowsPapa]

I bought my Gladiator with 37,000 miles on it. So I think it is out of warranty.
I had an issue with my wife's BMW using the 5w20 oil that it called for. It was burning oil. I went to 5w30 and it runs great on it.
I didn't think there would be any issue going to 5w30 or 0w30 in the Jeep. I wouldn't put 10w30 in it or anything thicker than 5w30 in it just for personal preference. I know other people do, and I think that is fine.
I don't sweat the oil brand thing, everyone has their preference. Just like I married a blond and my best friend married a brunette, just personal preference- and I always respect everyone's personal preference...

There's good oil that has really excellent, or even "quite good" wear protection, and then there's stuff that I'd not put in something I truly cared about.
Your top brands - AMSOIL, Pennzoil, QS, Mobil 1 - all fall into the very good protection area (there's others, too numerous to mention)
Sometimes preference is not based on any facts, but anecdotal stuff, and sometimes it's based on a lot of study and science.
There's oil out there that is "preferred" by some that I'd not put in a lawn mower engine.
The goofy thing is that over time, the brand with a great oil at one viscosity may put out an oil with a different formulation and viscosity that's poor in wear protection.

I put Renewable Lubricants, Super High Performance Passenger Vehicle, Bio-SynXtra in my 73 built-up 360 and after a short time, I had to totally readjust the dual-quad carbs as the idle jumped up about 200 RPM. I had to set things back down. I'd never before seen such a drastic change. I did some more digging and found it's really impressed at least one engineer.
I feel good using it because I do very frequent oil changes in that vehicle (due to the carburetion, there's a whole lot of fuel washing into the crankcase) and it's bio-degradable - among other factors that make me glad I'm using it. Less fuel wash since switching to carbs with annular boosters, but it's still something to watch with about 1200 cfm of carburetors on it.

 

[dayusmc]

Exactly, I know there is probably better oil out there than the Amsoil Signature Blend.
I didn't want to go down the oil rabbit hole trying to find it. I watched a few videos on some tests, it looked like good oil to me, so I went with it .
I have been using Amsoil in my dirtbikes for hears anyway and it has been good.
I appreciate everyone's input and keeping the post on topic!

 

[ShadowsPapa]

Exactly, I know there is probably better oil out there than the Amsoil Signature Blend.
I didn't want to go down the oil rabbit hole trying to find it. I watched a few videos on some tests, it looked like good oil to me, so I went with it .
I have been using Amsoil in my dirtbikes for hears anyway and it has been good.
I appreciate everyone's input and keeping the post on topic!

Short answer - you'll be fine. Decent oil, not far from the "recommended specs".

 

[dayusmc]

So my wife's BMW owners manual has the temperature chart do determine oil viscosity. I think my Tacoma does too. I don't believe my Gladiator does. But like you, I question how good 0w20 is here at the Jersey shore in traffic...

 

[Hootbro]

We used to determine oil viscosity by climate but the book doesn’t give that option. I question how good 0w-20 is in 120° summers but if they say it’s ok then I guess it is. All I know is my gasser sounds like a diesel til it warms up. Not sure if I should try anything else.

Even a few years ago when a North American market vehicle owners manual only stated 5W-20 or 0W-20, you could look up another foreign market owners manual on the same vehicle and find other higher engine oil grades.

With the Gladiator and the Wrangler JL, it is still 0W-20 only across all markets to include the Middle East in the owners manual for those markets with no other grades listed.

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