"Jeep recommends oil that meets or exceeds MS-6395. This is an old and outdated specification and it can be tricky to find oil with it. The type of oil we are using in this write up has NOT been tested for MS-6395. It does however meet or exceed the required specifications. If you are concerned about warranty ramifications, Mobil Super Synthetic does have MS-6395 approval but was not available for us locally. It also is vastly more expensive."
Actually, Chrysler/Jeep only
recommends MS6395 certified oil that meets Chrysler's standards. They do not say "recommends" oil that meets or exceeds". The key words are "has not been tested" which is part of the requirements for MS approval process.
Actually the claim of it being an "outdated specification and it can be tricky to find oil with it",
is not completely accurate.
I have had no issues finding oil in the 5/20 MS requirement.Not all oil has it but common oil like Pennzoil or Valvoline have the MS standardin the 5/20that my Cherokee uses. In fact a different weight of oil in those brands may not have the MS 6395 certification.
Also I do not understand "outdated specification". Basically I read that entire statement as justification to use their oil regardless of the lack of Chrysler's MS6395.
But to be clear,
There is absolutely nothing wrong with Mobil 1 oil and I believe it will do nothing to impact your warranty or the engine by using it but there is that small issue of MS6395 not being certified for Mobil 1.
There is also a difference in word semantics in the manual. That is "recommends only" vs saying "requires" MS 6395 is a big difference when it comes to warranty issues in my opinion.
But in the real world with available oil brands that do have the MS6395 certification I see no reason to vary off to the ones that do not carry that certification. Pennzoil full synthetic, which I consider a high quality oil, which I do use carries the MS6395 on the label.
I would just suggest that Mobil 1 get on the stick and certify their oil for us instead of minimizing the semantics in their statement. It is either MS6395 certified or not. If its not on the label then its not certified, regardless of what they are trying to say
For the record, I never referenced what the "manual" said. I stated what "Jeep" recommends. I have contacts within Jeep where I discussed this. I also have (in writing) from my dealer that they do not use MS-6395 certified oil but rather an oil that exceeds its rating.
I'm happy you can find the oil locally, but I can't. So I stand behind my statement along with it being outdated (I consider a document 15 years old outdated).
The article was to help people change their oil, there is no reason to get butt-hurt about my views. Take it or leave it... Frankly I don'y give a crap.
Edit to add, and since semantics seem to be an issue. Here is an excerpt from the manual. Note: It doesn't say it has to me certified for MS-6395, but rather the manufacturer "only recommends" engine oils that "meet the requirements" of it and are API certified. A recommendation isn't a requirement....
The manual does go on to say that only oils of the proper SAE viscosity grade and API seal should be used. The API seal is not for MS-6395 though.
I With SS on this also this.. Quoting WO 1 OA (Oil Analysis) to back up keystroke claims, Oil is spec to the tolerance of the rotating mass... NOT 1 comment that I've seen tore town there engine measured the clearances.... FCA builds 100,000s of engines so it must spec oil that will work in all of them , That's NOT a guarantee that 0-20w 10-30w is the correct viscosity, (Cold weather rules do apply) UNLESS YOU DO OAs WITH ESTABLISH TRENDS. I will run 10-30w and let My OA dictate what to use.....You need ALOT more then OE recommendation to condemn oils. Now their are engines that require supplements that's different than manufactures Spec #s .
Run your oil of choice and let your OAs dictate, the grade type, and additive package.. last time I checked the 3.2 has Rods and main bearing, Pistons, Rotating mass that needs lubrication, just like millions of other engines.
Here's My ED OA, My KL will get its 1st OA shortly, it only has 1800 miles.