which oil?

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Apr 30, 2010 | 12:52 AM

spahr69

Thread Starter

Senior Member

Joined: Jun 2009

Posts: 562

Likes: 0

From: pennsylvania

Year: 1995

Model: Cherokee

Engine: 4.0 liter

which oil?

im currently running 10 w 30 through my 4.0 liter auto.. but im using Valvoline. is that alright?

Apr 30, 2010 | 01:09 AM

91familyxj

CF Veteran

Joined: Aug 2009

Posts: 1,263

Likes: 0

From: Las Vegas

Year: 1996 Limited

Model: Grand Cherokee

Engine: 5.2

I run Castrol 10w 40 in mine. There is alot of talk on oil and Im sure this thread will end up the same. lol I would say our fine using that

Apr 30, 2010 | 02:57 AM

88JpCherokee

Newbie

Joined: Feb 2010

Posts: 11

Likes: 0

From: Washington

Year: 1988

Model: Cherokee

Engine: 4.0l v6

Yeah i'm running Castrol 10 w 30 and it works just fine.

Apr 30, 2010 | 04:16 AM

LCFRJEEP

Seasoned Member

Joined: Nov 2008

Posts: 452

Likes: 0

From: Virginia

Year: 1997

Model: Cherokee

Engine: 4.0 H.O.

Mobile 1 full synthetic all the way! All of my fluids from front to rear are all Mobil 1!

Apr 30, 2010 | 08:01 AM

89Laredo

CF Veteran

Joined: May 2009

Posts: 10,423

Likes: 61

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by LCFRJEEP

Mobile 1 full synthetic all the way! All of my fluids from front to rear are all Mobil 1!

If your gonne run M1 use the "high mileage" its SL rated, and has an amount of zinc that should be ok for your cam.
The SM rated stuff doesnt have enough zinc.

OP, Valvoline is fine, Rotella is better. Dont use pennzoil. Im using maxlife.

Apr 30, 2010 | 08:45 AM

hotride3021

Member

Joined: Jul 2009

Posts: 244

Likes: 0

From: Indiana PA

Year: 1995

Model: Cherokee

Engine: 4.0L HO

Quote:

Originally Posted by Defiance665

Dont use pennzoil.

Y should we not use pennzoil?

Apr 30, 2010 | 09:16 AM

93XJLI

CF Veteran

Joined: Jan 2008

Posts: 3,671

Likes: 10

From: LI, NY

Year: 1998

Model: Cherokee

Engine: 4.0, bolt ons for days...

Quote:

Originally Posted by hotride3021

Y should we not use pennzoil?

theres basically no zinc in it, which doesnt lube the flat tappet camshaft in the 4.0 very well.

i use shell rotella 15w-40 diesel. love it.

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Apr 30, 2010 | 09:17 AM

89Laredo

CF Veteran

Joined: May 2009

Posts: 10,423

Likes: 61

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

Email from Pennzoil/QS pretty much telling me not to run their oil..

Quote:

Dear Dylan,

Thank you for your inquiry.

The zinc and phosphorous (ZDDP) levels were reduced in passenger car
motor oils as there had been concerns that the oil that makes its way
in to the combustion zone of your engine, carrying these anti-wear
metals, were burning and poisoning the catalyst in the catalytic
converters. If you are seeking higher ZDDP content you could use a
heavy duty diesel engine oil such as Shell Rotella T 10W-30 which
contains approximately 40-45% more anti wear additives. This motor
oil is perfectly acceptable to use in a gasolone engine and exceeds
API SM performance specifications.

Should you desire to speak with a technical representative to discuss
this issue in more detail please call Pennzoil-Quaker State Technical
Information at 1-800-237-8645.

Sincerely
Product Technical Service -RM

On Thu, 22 Apr 2010 13:18:17 -0700 you wrote:

>Im wondering what Oil you recommend for Flat Tappet cams (89
>Cherokee, 4.0l) to prevent premature Valvetrain/cam wear.
>I am worried that the amount of zinc in my current oil may be too
low and am
>looking for something I can find at the local Walmart that
>isnt too expensive.
>Thanks,
>Dylan

Quote:

Originally Posted by 93XJLI

theres basically no zinc in it, which doesnt lube the flat tappet camshaft in the 4.0 very well.

i use shell rotella 15w-40 diesel. love it.

Thanks...

Im switching mine to Motorcraft diesel 10w40 next oil change..

Apr 30, 2010 | 09:59 AM

GoreXJ95

Senior Member

Joined: Mar 2009

Posts: 688

Likes: 0

From: Owensboro, Ky.

Year: 1998

Model: Cherokee

Engine: 4.0 liter

im using castrol 10w 30 and it runs normal but as time goes on i start to notice i use oil alot more. My dad has used the Pennzoil all the time in his jeep and he has never had an issue with it.

Apr 30, 2010 | 06:02 PM

#10

Bigclubs

Member

Joined: May 2009

Posts: 193

Likes: 0

From: Rochester NY

Year: 1996

Model: Cherokee

Engine: 4.0l

I mostly used Castrol these days, but my first 4x4, a 1980 CJ7 always had the oil changed using Quaker State. When the compression was down to 100psi in 2 clyinders, I had the engine rebuild. Back then most engines did not last more than 100,000 miles. The mechanic rebuilding the engine said the Oil passages were the cleanest he had come across. I don't think you would find many giving 2 thumbs up for quaker stated these days. Most all oil change shops now use Castrol or Penzoil.