which oil?
04-30-2010, 12:52 AM
#1
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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?
04-30-2010, 01:09 AM
#2
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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
04-30-2010, 08:01 AM
#5
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The SM rated stuff doesnt have enough zinc.
OP, Valvoline is fine, Rotella is better. Dont use pennzoil. Im using maxlife.
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04-30-2010, 09:17 AM
#8
CF Veteran
Email from Pennzoil/QS pretty much telling me not to run their oil..
Thanks...
Im switching mine to Motorcraft diesel 10w40 next oil change..
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
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
Im switching mine to Motorcraft diesel 10w40 next oil change..
04-30-2010, 09:59 AM
#9
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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.
04-30-2010, 06:02 PM
#10
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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.
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