Wrangler JK 3.6 Pentastar Oil Recommendations

Hey guys,

just a quick heads up about my last experiences with my Wrangler JKU. I had the Oil Change Required light coming up a few days ago and decided to give the beast what it wants - fresh lubrication. Looked up several forums and what I found was, that the manufacturer (which is Chrysler) made a change for Pentarstar engines from 5W-20 to 5W-30 and that some people had tried out 5W-40 full synthetics and achieved good results with their choice. After a lengthy research process at Autobarn (they have a lot of different oils) after thinking about it I decided to give Penrite 5W-40 a go. It's recommended for cars that use 5W-30 but gives it extra protection in hot environment. And as I plan to go to Fraser over the holidays it didn't sound too stupid.


I also bought a couple of genuine Mopar Oil filters from ebay (80 bucks for six). Replacing the oil filter in the new pentastar engine is easy as stealing a babies lollies.

The Oil change was a quick procedure, have to admit that my mate Adam did it for me since he had the tools and gloves. Will do it definitely myself next time. I remember how much work it was, changing it on my Pajero. I had to take off the bash plates to get to the oil filter. Now I just have to pop the bonnet, take off the plastic engine cover (the one with the big 3.6 VVT emboss on it) and unscrew the filter cartridge.

How much engine oil for the Pentastar Engine?
We couldn't find any metric figures on the web about how much oil the engine needs. Everywhere we looked people just stated 6 quarts. Luckily good old google does a calculation which states "5.67 Litres".

Back to the oil topic. I sank my fingers into the old oil pan and found that it was pretty black (like char coal) so it was definitely due for a change. With the new oil in the fuel usage immediately started dropping a tenth of a litre every 2-3km and now I am sitting at around 10.6 L/100 km. The engine seems to be quieter and and causes definitely less vibrations. I am happy with that and will keep you updated after our island trip. Let's see how it behaves in the heat. :)
HillsForThrills

Can't say I know much about the Jeep engines... But as far as I'm concerned, you've put the world's best oil in it mate! I've run Penrite products exclusively in my vehicles for the last 16years, without a single issue or failure that can be attributed to them... Also 100% Australian too, so it's a win-win all round... Good choice mate! :)

More from our Forum


dalenereddy in News and Updates
Shopping Discount Voucher From JK Warehouse

Hi everyone,the guys from JK Warehouse (a Jeep parts shop in Brissi) have contacted us over the...

GamesBX2910 in Members Introduction
Hi Everybody

Hi everybody First word, thank you for your question and I would like to introduce myself that my...

Carlosshogun in Mitsubishi Pajero
Pajero Gen 2 Rear Bar With Winch And Jerry Can Holder

This is a rear bar for a Gen 2 Pajero (NH, NJ, NK, NL). It comes with a winch cradle, recovery...

mikebrian1 in Offtopic
Black Friday Online Deals Promotions Store??

Hey Folks! Please mention the online store details which can offer a black Friday deals. Anyone who...

mrbane in Members Introduction
I Am Keeta192 And New To DownThunder

Hey guys n gals. North brissy. 6yo spawn. I don't wanna be all public heyim the noob

Scoteye in Ssangyong Offroad Cars
P0190 & P0120

So I knew that I may have issues going for a lesser known foreign vehicle but the price was right....

1mak in Jeep Wrangler
Superchips Flashpaq 3870 Review

Hey guys, you know it's true what they say. Jeep empties everybody's pockets. I plan to put bigger...

SheldonTrever in Daihatsu Terios II
Do You Still Need To Maintain A Black Car With Ceramic Coating?

Hey guys, As we all know, a Black Car is one of the hardest color to maintain. Very easy to look...