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Jun 28, 2011 | 12:48 PM

#21

wheels082

JK Newbie

Joined: Nov 2010

Posts: 69

Likes: 0

From: Lansing,Mi

Amsoil oil and an Amsoil oil filter.

Jun 28, 2011 | 12:58 PM

#22

Owl

JK Enthusiast

Joined: Aug 2010

Posts: 268

Likes: 2

From: Tucson

Quote:

Originally Posted by Wandell

I disagree. I'd follow the manufacturer's recommendation on oil weight. This is from personal experience. In 1992, Ford recommended 5w20 in the new Crown Vic's 4.6 engine. We had a police chief and shop supervisor that believed that 20w50 would provide much better protection. Long story short, Ford charged a total of $4000 in 1993 to replace a 4.6 engine (and we blew two of them). The blown engines oil pic up looked like it was covered in tar. We started following Ford's recommendation and to date we have never blown another 4.6 engine.

Interesting. I can't remember the requirements for my old 91 Cherokee (I think it was 10W-40), but I used Castrol 20W-50 for its entire life with me. Sold it last September with 377,000 miles. It's still running.

This is an interesting thread. Good to hear the various reports and histories of those experiencing different phenomena with different oil.

Jun 28, 2011 | 01:01 PM

#23

LSU Tiger Jeeper

JK Newbie

Joined: Feb 2011

Posts: 28

Likes: 1

From: Baton Rouge, Louisiana

5W-30 Royal Purple stopped the slight pinging noise I had when I first started the motor. I also use a Royal Purple oil filter. I change the oil every 5k miles. No worries

Jun 28, 2011 | 01:27 PM

#24

Monte417

JK Super Freak

Joined: Oct 2010

Posts: 1,444

Likes: 1

From: East Meadow, NY

Been using mobile 1 synthetic 5w-20 with mobile 1 filter but was a quart and a half low everytime 5k miles later so switched to 5w-30 on my last change 500 miles ago. Ive noticed my mileage isnt as good but i hear you wont burn as much using this weight. Someone please correct me if im wrong

Jun 28, 2011 | 01:40 PM

#25

Wandell

JK Freak

Joined: May 2011

Posts: 868

Likes: 8

From: Cairo, GA

Don't get me wrong. Something like 5w30 probably won't hurt anything but I would't try something as thick as 20w50 or straight 30w. I think that would be just asking for trouble.

Jun 28, 2011 | 02:36 PM

#26

drumnatural

JK Freak

Joined: Mar 2009

Posts: 524

Likes: 2

From: Maryland

Changing oil weights is not a good idea if u have the unlimited warranty on the drivetrain. We know chrysler will void the warranty at a drop of a dime.

Jun 28, 2011 | 03:27 PM

#27

dogshmog

JK Newbie

Joined: Jun 2010

Posts: 45

Likes: 0

From: Grapevine, TX

I liked running 5w30 myself.

Jun 28, 2011 | 07:34 PM

#28

TieRod

JK Newbie

Joined: Jan 2011

Posts: 86

Likes: 0

From: LHC AZ

My mechanic sez to use the 5W-20 as per mfg's recommendations. This is due to the closer bearing tolerances on newer engines. A thinner oil will flow in tighter passages and provide proper lubrication. Makes sense to me; I use Mobil 1 and change yearly or 5k miles.

Jun 28, 2011 | 07:50 PM

#29

zig650

JK Newbie

Joined: Mar 2010

Posts: 83

Likes: 0

From: Ramona, Ca.

Quote:

Originally Posted by Michiguy

I am a fan of Royal Purple (oil and filter). A bit expensive but I am ok with it and I plan to change the oil every 5K.

Be careful with royal purple, yes it's a very good oil however being a died oil (purple) the die has a tendancy to hide or mask contaminents and metal shavings.I don't want to diacourage you from using it just a friendly heads up. Lucas and amsoil are also excellent choices.

Last edited by zig650; Jun 28, 2011 at 07:53 PM. Reason: Spelling