best way to remove sludge from the engine? - Page 2 - JeepForum.com

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post #16 of 45 Old 11-16-2013, 10:53 AM
PolkaPower
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Do you not understand that the additive packs are part of the oil? They are not separate from the oil. People switch oil all of the time from summer to winter with cars, trucks, and heavy machinery.

Where are your facts?

In the 60's when synthetic came out it was bad to switch because it would shrink or expand the seals at different rates. Oils today do not have that problem.

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post #17 of 45 Old 11-16-2013, 11:03 AM
JohnCrabtree
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I understand that additive packages are chemicals that oil manufacturers add to their oil. It is common knowledge among mechanics that not all oil additive packages are happy together. Most will be fine, but not all.

I don't consider **** that I find on the internet "facts". However, if you really want to see some "facts" then here:
http://www.machinerylubrication.com/...ing-lubricants

"Incompatibilities between additive packages. Problems here can include additive precipitation, loss of antiwear performance, loss of demulsification properties, reduction of oxidation stability, and the loss of storage stability when mixing lubricants in storage tanks."
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post #18 of 45 Old 11-16-2013, 11:05 AM
JohnCrabtree
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And my point was that article was SPECIFICALLY talking about synthetic vs peutroleum based oils. They were simply talking about whether or not the oils would expand at different rates and lubricate more/less etc etc. They were not talking about the additive packages at all.
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post #19 of 45 Old 11-16-2013, 11:51 AM
PolkaPower
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All you are telling me is that hydraulic oil should not be mixed with turbine oil, or locomotive oil should not be mixed with racing oil. This still proves nothing with common automotive oil, which is highly standardized today.
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post #20 of 45 Old 11-16-2013, 01:02 PM
JohnCrabtree
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The point remains the same whether it is engine oil or turbine oil or hydraulic fluid. The additives are not designed to be mixed.
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post #21 of 45 Old 11-16-2013, 01:18 PM
PolkaPower
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They may not be meant to be mixed but it sure won't cause harm to the motor. And the point is not the same because mixing lubricants together that are designed for totally different machines will cause huge problems. This is not so with conventional motor oil. At the most it will reduce the oils longevity and cancel out some of the beneficial properties. That isn't even an issue if you do oil changes on time like you should. Sludge builds up from lack of maintenance.
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post #22 of 45 Old 11-16-2013, 02:04 PM
JohnCrabtree
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Quote:
Originally Posted by PolkaPower
They may not be meant to be mixed but it sure won't cause harm to the motor. And the point is not the same because mixing lubricants together that are designed for totally different machines will cause huge problems. This is not so with conventional motor oil. At the most it will reduce the oils longevity and cancel out some of the beneficial properties. That isn't even an issue if you do oil changes on time like you should. Sludge builds up from lack of maintenance.
Mixing those additive packages can cause all kinds of different ****. Mainly your seals go bad faster. I'm not a scientist so I can't sit here and say "if you mix A with B your oil will deteriorate blah blah blah" but it is a well known fact that mixing different oils MAY cause premature engine damage.
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post #23 of 45 Old 11-16-2013, 03:03 PM
PolkaPower
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Let's just agree that we both like beer instead.
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post #24 of 45 Old 11-16-2013, 03:09 PM
JohnCrabtree
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Quote:
Originally Posted by PolkaPower
Let's just agree that we both like beer instead.
Agreed.
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post #25 of 45 Old 11-16-2013, 07:09 PM Thread Starter
bumperthumper
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Geezus guys. That escalated quickly. I know I'm not getting it squeaky clean, but I just want my 205k mile 4.0 to make it through the winter lol.
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post #26 of 45 Old 11-16-2013, 07:23 PM
JohnCrabtree
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Quote:
Originally Posted by bumperthumper
Geezus guys. That escalated quickly. I know I'm not getting it squeaky clean, but I just want my 205k mile 4.0 to make it through the winter lol.
Lol, welcome to da interwebz.

But yeah, I'd try seafoam first
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post #27 of 45 Old 11-16-2013, 07:54 PM
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post #28 of 45 Old 11-16-2013, 07:56 PM
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post #29 of 45 Old 11-16-2013, 09:15 PM
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Back in the day we used to put a quart of diesel in the crankcase before draining the old oil, let it run for a few min then drop the oil.

Today, there are so many things that you can add to the oil that it is up to you to decide. Any additive that is designed to flush the engine of sludge should help the situation, just follow the directions exactly as directed.

Once done, use a good quality oil and change regularly.
I don't have a sludge problem, but the ZJ sat for a while so I am flushing/conditioning mine at the moment with Marvel Mystery Oil, before I drop the oil again. I use Mobil 10W-30 conventional.

1998 ZJ Limited 5.2L (upgrades in progress)
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post #30 of 45 Old 11-16-2013, 09:52 PM
JohnCrabtree
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Marvel mystery oil really is some good stuff. Great for freeing up stuck rings
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