Change oil more often as engine ages - JeepForum.com
 
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post #1 of 7 Old 07-31-2017, 09:42 AM Thread Starter
diver110
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Change oil more often as engine ages

Here is a tip I got from a mechanic friend recently. My 2009 hemi calls for oil changes (as I recall) every 6000 miles. I have been doing it every 5000 miles. I now have about 140,000 miles on the engine and use about a quart of oil every 5000 miles. A mechanic friend told me to start changing the oil every 3000 miles. Apparently, as tolerances develop, combustion contaminants can get into the oil. By changing it every 3000 miles I may limit this process, use less oil, and get more life out of the engine.


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post #2 of 7 Old 08-05-2017, 09:40 PM
tsteb112
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Quote:
Originally Posted by diver110 View Post
Here is a tip I got from a mechanic friend recently. My 2009 hemi calls for oil changes (as I recall) every 6000 miles. I have been doing it every 5000 miles. I now have about 140,000 miles on the engine and use about a quart of oil every 5000 miles. A mechanic friend told me to start changing the oil every 3000 miles. Apparently, as tolerances develop, combustion contaminants can get into the oil. By changing it every 3000 miles I may limit this process, use less oil, and get more life out of the engine.
Good tip. It makes sense though if you think about it.

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post #3 of 7 Old 08-12-2017, 12:00 AM
LouC
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Why not do a Blackstone oil analysis; that will tell you how far you can go by how the oil is holding up and how the engine is wearing. That way you're not guessing and not wasting oil.
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post #4 of 7 Old 08-13-2017, 11:46 AM
PolkaPower
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Quote:
Originally Posted by diver110 View Post
Here is a tip I got from a mechanic friend recently. My 2009 hemi calls for oil changes (as I recall) every 6000 miles. I have been doing it every 5000 miles. I now have about 140,000 miles on the engine and use about a quart of oil every 5000 miles. A mechanic friend told me to start changing the oil every 3000 miles. Apparently, as tolerances develop, combustion contaminants can get into the oil. By changing it every 3000 miles I may limit this process, use less oil, and get more life out of the engine.
Oil is getting sucked through the intake by the pvc. Put a catch can on it.
I've read people using 5w30 with no problem from the mds. I use 5w40 Rotella but I have mds turned off.
I feel like the mds is an emissions/mpg gimmick and not necessary. After I got a good performance tune with mds turned off, I'm getting the same mpg as before.
They really neutered the hemi from the factory to meet emissions standards. It's has a lot more potential once you start with the performance parts. The transmission shifts terrible from the factory too.
Seems like changing the oil every 3000 miles is a big waste of money since modern synthetics can go 10,000 miles.

In my opinion 5w20 is too thin for these motors and only uses for the mds and to help mpg. The downside is shorter engine life. Thicker oil will protect the motor more but you'll lose a little mpg.
If you really want to know and not take a wild guess then what Lou suggested is the way to go.
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post #5 of 7 Old 08-13-2017, 07:21 PM
LouC
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When I did the oil analysis the wear rates of the various metals was all very good and the viscosity of the oil (Mobil 1 5/20) was good as far as viscosity and TBN. This was done when it had about 85,000 miles on it and the oil was sampled @ 4500 miles. Blackstone suggested going to 7,000 miles. I usually do it between 5-6k miles or about 2x a year.

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post #6 of 7 Old 08-22-2017, 11:32 AM
jeepjeepster
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Just had a TBN done by blackstone labs on my 1994 ZJ I6. Ive been changing it at 4,000mi for the past 50,000 and they said I should be good to try 6,000mi oil changes. Ill be doing 5,000mi changes from now on.

The engine is original and has 250,000mi on it. Uses a quart between changes.

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post #7 of 7 Old 08-23-2017, 05:32 PM
HangryMachinist
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WOW another oil change thread. LOL just kidding. You can change your oil every 3k or I would try upgrading to a quality synthetic (Redline or AMSOIL) Both of these companies have great additive packages and do much better than conventional/cheap synthetics. Its all about the additives. Just a thought as every engine and situation in unique.
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