I would say it would come along similar lines of metallurgy for being the reasons why you would use one oil blend over another for a specific application.
Or like multiple times in this thread that people have pointed out that because we don't truly know how well or poorly the motor was maintained in a used vehicle from the PO.... that at least erring on the safe side of running a few cycles with an oil that contains more detergents can help clean things out, and then use whatever you feel is best with your own research.
We're all here to share our thoughts and real-world experiences with our Jeeps and products for them. You take the information, learn from it, do some more of your own research (thinking for yourself)...and then make your own educated decision on what you're going to run in your own Jeep. We're discussing it like adults.. not bickering like a bunch of old ladies with nothing else to do.

 

My stroker was based off of and used a majority of the Mercruiser & Volvo Penta 3.0L. While not a powerhouse compared to your 4.6L, it's a harder working industrial engine, that's why I prefer the diesel oil. You will turn more varying higher RPMs than I will so, yes you will require that "cushion" additive where I need the detergent additives. The only oil bandwagon I won't get on is the Synthetic one. I just don't see any need for that in mine. Triple the money for something I change at 3k anyways?! Sorry, I'll just use some high detergent conventional to keep it all clean.

Now for some friendly debate regarding the Lucas additive. When this thread started a few years ago. Someone posted a video from Bob's "THE" oil guy about adding Lucas stabilizer to oil and it "foaming & milking" up. I called it out as bs because I saw ONE important thing others neglected. I was shot down and comments were deleted. Seeing as you seem to know a little about oil, do you want to know what that thing was? He added conventional oil additive to Synthetic oil. Now we both know you can't mix older conventionals and newer synthetics or else that happens WITHOUT additives. By the way guys, if you do use synthetic and feel you want to use Lucas, they do make one just for synthetics. Guess my overall point is, so.e may see or notice something others don't. If you do, not only bring it up but have something to help back it up. (This goes to ALL of us here) Hell, it took people almost a year to find out what I tried to show them. Lol

 

There is no problem with mixing synthetic and regular oils. That is basicly what a synthetic blend is.

 

You don't mix newer synthetics and older conventionals. Now yes there is what's called a Blend mix (newer style of oils) But those are specifically designed so they can be used with either/or. So go ahead and mix that old school Texaco/Halvoline conventional with some Mobil 1 Synthetic and let us know how that works out for you.

 

This is the third time in a week this thread has needed to be cleaned up. Stay on topic, and stop bickering. Discussions are welcome, but let's act like adults, shall we?

If it gets out of hand again, I'm locking the thread.

 

Well if you're gonna move it back, unlock it, LOL

(No worries, buddy, I got it for ya, haha)

 

It's not the mixing of synthetic and conventional base oils that causes a problem. There is a RISK (not a guarantee) of issues from the mixture of the differing additives. Since one cannot separate the oil from the additives, this becomes semantic, but this whole thread is semantics since it is 60 pages of people discussing and repeatedly bickering about a hair-splitting difference between Rotella in the Jeep 4.0 and all the other oils (most of which do equally great in reality--my UOA's have all be equally great on German Castrol 0w30, PYB 5w30, and T6 5w40).

I'm all for hair-splitting and getting down in to nitty gritty science, but many of you seem to be forgetting that we are splitting hairs and taking this WAY too seriously. Many of you are also forgetting that this entire discussion is best handled scientifically rather than anecdotally or emotionally. Settle down and get your perspective back in order, please.

 

^^^This!^^^

 

More than a few times I have witnessed Rotella cleaning out the sludge in 4.0s.

 

I actually replaced all the cooking oil in my house with Rotella T6.

 

 

Bow before it. Let it cleanse your engine and your soul. Let it sweep the worry from you and take the burden you carry.

 

hey there Curry.... should we also queue the angelic music to that too? LMAO...

 

 

I use Rotella T6 as part of my health cleanse. Really flushes ya out good.