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Unread 06-13-2014, 05:44 PM   #1
bigkat91
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2011 MK Compass 
 
Join Date: Sep 2011
Location: Moravia
Posts: 131
New to me oil consumption

Last oil change I put in regular white bottle valvoline. About 3000 miles into the oil change interval I checked the level (usually doesn't use any oil) and it was half full on the dip stick. I had been using Synthetic the previous 80,000 miles with no issues as stated before. I check the pcv valve and it rattles well blew through the hose it was clear and checked the hose running from the top of the valve cover to the air box. Tail pipe was a little sooty but not bad for a vehicle with that many miles. I switched back to synthetic this morning to see if it rectifies the situation. Has anybody have this issue when switching back to conventional after a long synthetic run.

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Unread 06-14-2014, 08:24 AM   #2
Redpine
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2014 MK Patriot 
 
Join Date: May 2013
Location: , MIchigan
Posts: 34
Yes, I have read about this phenomenon on Bobistheoilguy. It can happen when changing oil type (synthetic vs. conventional, vice-versa) or even when changing brands.

There is no definitive explanation why this sometimes happens. It's all speculation. Many report that after several thousand miles, the consumption returns to normal. Some think that maybe the new oil additive package is "washing away" (lack of a better term) the protective molecules embedded in/on the metal engine parts to be replaced with the new oil's protection additives. Once this is complete, the oil consumption returns to normal.

Opinions abound and mine is that some things go unexplained. You won't know unless you try the conventional oil for a longer period and observe the results. If you visit the site you might find more answers. People don't seem to be too concerned about it. In other instances, sometimes a different oil will clean off deposits on an older engine (ie - seals) and a leak will develop. The leak was bound to happen because the seal was wearing, but people like to blame the oil.
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Unread 06-15-2014, 06:45 PM   #3
tjkj2002
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2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,227
90% of your synthetic oils are actually not true synthetic,just highly refined conventional oil.You will not have any issues switching back and forth.


Your oil change interval can be a cause of the oil loss.The more miles the more oil a engine will start to use.
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Unread 06-15-2014, 06:56 PM   #4
bigkat91
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2011 MK Compass 
 
Join Date: Sep 2011
Location: Moravia
Posts: 131
I'll continue to monitor oil levels. Its a 2011 with roughly 84k on the clock now and I've never had an oil issue before this last oil change.
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Unread 03-02-2015, 10:28 AM   #5
lastontheboat
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2013 MK Patriot 
 
Join Date: Mar 2015
Location: Richmond, Virginia
Posts: 5
I use conventional motor oil. Found a table spoon of oil under my 2013 Patriot (2.4L 16,000 miles) yesterday (2-28-15). Jeep is currently sitting at the dealership awaiting an oil leak test. Apparently Chrysler says it is acceptable to lose 1 quart every 2 thousand miles. I had no idea that loosing 25% of your oil capacity every 2k miles would be acceptable. I have a 1998 Saturn that doesn't burn a quart every 3K.
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Unread 03-02-2015, 11:08 AM   #6
bigkat91
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2011 MK Compass 
 
Join Date: Sep 2011
Location: Moravia
Posts: 131
I've changed the pcv valve and switched back to "synthetic" and have lost only a half quart in 6000 miles. I'm now only 750 miles away from reaching 100k. Happy Jeeping.
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