2006 Jeep I6

[rraiderr]

I got quite an ear full from another local shop mechanic about me using AMSOIL Signature Series 0w30 Synthetic Motor Oil in my 2006 Jeep Rubicon with I6 motor.

I was told that it is bad and will causes excessive wear if I continue use the AMSOIL Signature Series 0w30 Synthetic Motor Oil in the I6 due to the engines top end design.

I am a little confused on this one. I know the I6 is a bit of a tractor motor but how could using a top shelf oil like AMSOIL Signature Series 0w30 cause excessive wear?

My Jeep sees lot's of bellow 0 farenheit starts and so far the Jeep starts like a champ with the AMSOIL Signature Series 0w30 Synthetic Motor Oil in it.

Thanks for the help

 

[Bryanccfshr]

That oil will work great in your jeep

 

[JohnBrowning]

Your mechnic is a not up to date on oils! Few of them are. It would be like going to your GP and asking about orthodic inserts for your shoes. Many of them know what they are but have zero practical experince where as a podiatrist or physical therapist could take one look at your old shoes and your feet and tell you right away how much you might benifit from a pair! Different information and experience level for each proffesional! Mechainic are great at diagnosing a problem and fixing it! When it comes to oil though they are seldom up to date.You mechanic could be a great one and still be a knuckle dragger with reguard to oil!

They often know what has produced great results int he past though! I usualy recomend a 5W40 for the I6 as they tend to like them.

 

[Warstud]

Is it spec'd for a 5W20?

 

[ThirdeYe]

I've had someone try to tell me horror stories about using Amsoil in my Integra as well... "I know a mechanic who knows a top mechanic on motorcycles and he wouldn't use it!" and he was talking to me like I had absolutely no clue what I was doing and I shouldn't be sending in my used oil analysis for an analysis because it's unnecessary (this was a postal employee). Needless to say, my used oil analysis came back flawless and I wanted to print it out and show it to him, but never did...

 

[EricF]

I agree that a lot of mechanics/techs know little about oil.
Most go with OE spec, which is 90% conventional oil, and they usually stick to a name brand like castrol or valvoline.
The shops that "know better" will get cheap oil, because, "oil is oil is oil is oil".
and some still believe in the old myth, that synthetic oil creates leaks and doesn't adhere to the internal parts as well.

There's still a lot of ignorance out there..

 

[tomcat27]

I've owned and maintained MANY jeeps of many years and with many engines - and certainly many of the 4.0's. and used Amsoil exclusvely in a couple of them. My comanche had 200k on it and it only got retired due to rust. I would call "foul" on your mechanic. besides, like you said, its essentially a low-tech engine: 2 valves per cyl, lower RPM, etc. I'd also agree that many "experts" don't know what they are talking about.

 

[Chris142]

Originally Posted By: Warstud
Is it spec'd for a 5W20?
10w30

 

[Zaedock]

Amsoil 0W30 wreck a 4.0L?

A Jeep 2.5L/4.0L/4.2L engine will go 200K on grocery store oil changed every 10K miles. Amsoil 0W30 is like liquid goodness for your Jeep. It will live a long and healthy life.

 

[Nick R]

Ask him what part of the Overhead Valve rockers will result in massive wear on Amsoil 0W-30. I would be amused to hear his response. There is nothing to mess up in that part of the engine. Its 12 rocker arms. Can't get much simpler than that. Zaedock is right, those AMC designed engines will last forever.

 

[rraiderr]

Thanks for the help guys, I can now stop stressing over this.

 

[GameOver]

I question "professionals" all the time because of statements like that. I think you've picked a great oil for your application. I have the same motor in a 03 Rubicon and run Shell Rotella T 5w-40 with great results.

 

[Gary Allan]

Keeping up with the full scope of automotive evolutions is not easy. I also doubt the guy knows about all the aspects of various tire configurations if he's not a tire dealer and suspension specialist. That is, don't pull too much of a beat down on him for it. While he made a bad call, I have to admit that the oil flow to the head in my 4.0 (99) isn't anything like an old SBC or a number of other pushrod engines that I've observed. Even with a high volume pump it isn't anything like the Niagara Falls experience when you start up an SBC with their standard pump. That is, he could have been totally wrong in a semi-rightly manner

Use SSO, HDD, and just about any other oil that you please. The choice will probably just alter how long you leave it in for.

 

[Zaedock]

Originally Posted By: Gary Allan
While he made a bad call, I have to admit that the oil flow to the head in my 4.0 (99) isn't anything like an old SBC or a number of other pushrod engines that I've observed. Even with a high volume pump it isn't anything like the Niagara Falls experience when you start up an SBC with their standard pump. That is, he could have been totally wrong in a semi-rightly manner

This is why I typically install a Melling high volume pump into my off road rigs. IMO, stock pumps are fine for street rigs and most off road situations, but when you're sitting on your side, waiting to get pushed back over, a little extra flow to the rockers is nice.