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Unread 04-07-2013, 07:33 PM   #1
ROFLwaffles
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1998 ZJ 
 
Join Date: Mar 2013
Location: University Place, wa
Posts: 168
4.0 engine tick. New oil?

My 97 zj 4.0 has 198k miles on it. And has developed a bit of a tick. I have been told that this is actually quite normal for these I6 engines.

I live in Washington state, and our temps never really vary that much during winter or summer (not too hot, not too cold). I have been running a standard 5w-30 oil. But I am wondering, would it be better to run a 40w? Maybe a 10w-40? And are there significant advantages to a "high mileage" oil?

And if I do change the type, is there any particular additive I might want to try?

This stuff is all new to me. This is my first Jeep, and I welcome any advice you all may have.

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Unread 04-07-2013, 09:24 PM   #2
zander21510
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1995 ZJ 
 
Join Date: Jun 2011
Location: Dallas, TX
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Quote:
Originally Posted by ROFLwaffles View Post
My 97 zj 4.0 has 198k miles on it. And has developed a bit of a tick. I have been told that this is actually quite normal for these I6 engines.

I live in Washington state, and our temps never really vary that much during winter or summer (not too hot, not too cold). I have been running a standard 5w-30 oil. But I am wondering, would it be better to run a 40w? Maybe a 10w-40? And are there significant advantages to a "high mileage" oil?

And if I do change the type, is there any particular additive I might want to try?

This stuff is all new to me. This is my first Jeep, and I welcome any advice you all may have.
Give 10w-40 a try. Older engines tend to benefit from a little higher-weight oil.

If your wallet can manage it, try Rotella T6 5w-40. It stopped my ticking completely, very good oil. WalMart has the best prices on it.
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Unread 04-08-2013, 11:34 AM   #3
Pierre_r
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1989 XJ Cherokee 
 
Join Date: Jul 2009
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I always run 15w-40 in my Jeeps and Chevy trucks all year.
And here the temps can go down to -30c in the winter and +35c in the summer.
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Unread 04-08-2013, 11:46 AM   #4
SDHarleydad
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1994 ZJ 
 
Join Date: Jun 2012
Location: Spring Valley, CA
Posts: 188
Im running 20/50 oil with Lucas. It quiets the noises. I'm in San Diego so temp is not an issue.
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Unread 04-08-2013, 08:27 PM   #5
SINCITY192
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1994 ZJ 
 
Join Date: Mar 2012
Location: CHARLOTTE, nc
Posts: 190
For the ticking noise since you already have new oil in it I would add about a bottle of Marvel Mystery oil it works great if your ticking doesn't stop after adding that you probably have a valve seal issue, not really a hard job either but burning oil would be a good tell, tell, sign or white smoke from the tail pipe!
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