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Old 05-20-2013, 09:16 PM   #1
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rotella oil ???

Has anyone run rotella 15-40 diesel oil in there jeeps to quietin down the motor

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Old 05-20-2013, 09:31 PM   #2
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A heavier than recommended lubricant viscosity to muffle lifter noise at the expense of taking longer for the thicker oil to reach all the engine's tiny nooks & crannies doesn't seem like a good thing to me. I'd stick with the factory recommended 5W-30 or 10W-30. A little lifter noise in the 4.0L is normal. If you have excessive lifter noise, I'd have it looked at.

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Old 05-20-2013, 09:33 PM   #3
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Ok thanks just wondering
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Old 05-21-2013, 07:10 AM   #4
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Quote:
Originally Posted by billybob3358 View Post
Has anyone run rotella 15-40 diesel oil in there jeeps to quietin down the motor
The original Rotella oil was great for diesels but a few years ago they took out the additives that made it good to run in gas engines. It's still better than a lot of oils out there, but not as good as it used to be. I run rotella in most of my cars and trucks.
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