Wrangler TJ Engine Oil

[TJim]

Hey Guys,

I have a Wrangler TJ 2004 2.4L and I would like to ask some questions about engine oil!

1) Should I prefer conventional or synthetic oil?
2) The manual refers that I have to choose a 5w30 engine oil that meets the MS-6395 standards. Should I choose an oil with the MS-6395, or any major brand 5W-30 synthetic oil is ok?

 

[OilReport99]

Welcome to BITOG!

Yes, follow the manual recommendations.

 

[Chris142]

I think every oil passes that spec. Do keep in mind that you have a very rare engine with little to no replacement parts available. Run a good oil,filters and watch the temp gauge like a hawk.

Also it is a valve bender. While the valves will not hit the pistons they can hit each other if the timing belt strips or breaks.

 

[incognito_2u]

Material Standards-6395 is such a non stringent spec, and being that your out of "Warranty" you would be best served with any major producers 5W-30 oil. Synthetic will suit you fine.
With those 2.4 PowerTechs, make sure your diligent in replacing the Timing Belt......just saying!

 

[SwampSurvivor]

Originally Posted by Chris142
I think every oil passes that spec. Do keep in mind that you have a very rare engine with little to no replacement parts available. Run a good oil,filters and watch the temp gauge like a hawk.

Also it is a valve bender. While the valves will not hit the pistons they can hit each other if the timing belt strips or breaks.



I almost bought one in great shape with a bad headgasket. But ended up walking because it's nearly impossible to find that engine as a replacement. But those 2.4s will blow the head gasket if you sneeze wrong.

 

[Chris142]

The jeep 2.4 is based on the pt loser engine. I think the head is the same. The block is jeep only. If you window the block finding a replacement wont be easy or cheap.