Looks like the T6 0W40 is not JASO-MA approved....only the T6 5W40.

 

I've seen some relatively poor UOA results for wet clutch applications of T6. That said, I currently run it in my mx bike but change it every 2-3 hours. It seems to get sheared quickly in that use. I think its decent in a regular moto engine because you're not gear-smashing like the MX bikes.

 

Can u post some of those poor UOAs? And I would think those 190 HP crotch rockets can gear-smash with the best of them.

 

I recall reading a lot of threads that while it was certified, the boron and moly really wasn't ideal for wet clutches and there are better oils for that application.

 

An oil thread on a motorcycle forum.........a whole different can of worms. The song is pretty much the same, just different verses.

 

You have no idea.............................

 

Yeah I know what you mean, I just thinking more of MX/track vs street riding. I imagine it's equally poor at street track use where there is tons of clutch use / gear changing. The only thing I ever saw as a negative was that it sheared quick. The additive package was pretty good from everything I saw? I use it in my YZ250F and just change it around 2 hours since it shears but looks like it protects decently. Beats not changing it!

The moto oil threads are usually funny. 2 dudes say Rotella, 2 dudes say Amsoil, then the mods close it. ha!

 

Oh I think I have a good idea......I've joined way more bike forums over the years than Jeep forums.

 

I changed the oil & filter in my Jeep last week, after re-sealing the filter adapter.
The 5W40 Rotella-T6 oil seemed to be " thicker" compared to what I'm used to, as I was pouring it in the engine. I've used 10W40 before, but it wasn't a thick looking when pouring it. Oil pressure is up about 7-8 lbs, which may be good...
As long as the 4.0 stays glued I'll be happy with the T6 stuff though...

 

Then you have a very good idea............................Oil threads and Tire threads go hand-in-hand............LOL

 

Every other damn thread was a tire thread....I feel ya both. ..

 

Have either of u gone over to "the dark side"?

 

Sorry Mr. salad........kinda side tracked your excellent thread.

 

Hey Salad! Awesome Data! I'm hoping to bring my 4.0(YJ) back to life in a few months ...~204k... sounds like Rotella T6 will do her some good. De-lurked for the subscription. looking forward to the filter thread, if/when you do it.

 

5,000 miles on my engine and have always used dino 10w30. I'm using Rotella T6 now, 500 miles on this oil and I go to check the level its a 1/2 quart down? So I add another half. Is this a normal occurrence when switching from dino to synthetic?

Oil pressure is up slightly... so far so good otherwise! Definitely less 'tick' to the engine.