5W-20, 0W-20 or 5W-30 for 3.6L Pentastar (Jeep)

[KrisZ]

Yup, the minivan forums are starting to report cracked head issues as well on the Pacificas which are PUG. I'd rather deal with the failed rockers than the heads.

 

[IndyFan]

No harm, no foul, but I do struggle with his statement of "0w20 being advantageous in the PUG's valve train and timing chain". Many PUGs have failures in the valvetrain system (the JL forum is riddled with them) and while more likely due to the garbage design than the oil, I do not see how 0W-20 is helping either.

Mine developed a cracked head or block around 50K miles and worsened until I dumped it a little over 70K and while no fault of the oil, it highlights the design issues this engine has. The JL forums are starting to have quite a few posts about cracked heads, blocks, or blown head gaskets and valvetrain issues are easy to find there as well--again, likely due to design versus any magic elixir from a bottle.

Happy Thanksgiving!

That's the thing. The valve train issues are not oil related.

But they are also easy to find because 14,000,000 of these were built. I can't even wrap my head around that kind of number. If a tiny percentage experiences a valve issue, every mechanic sees it and thinks it is a horrible design.

I think in our larger Jeep club we've probably got more than 20 JK's with over 200k, and probably 10 or so with over 300k, all running great with never an issue.