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Unread 04-19-2010, 11:44 AM   #1
nkanakakis
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Join Date: May 2009
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5W-40 on Liberty KK 3.7

I have just changed oil on my Jeep Liberty KK 3.7 and the garage guy told me that he used 5W-40 instead of 5W-20 or 5W-30 that the user manual recommends
Is that ok or I need to go back and ask him to change the oil again
Please help

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Unread 04-19-2010, 01:03 PM   #2
tjkj2002
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Use only 5w20 or 5w30,have them change it to the correct oil now on there dime.5w40 is only for the CRD's.
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Unread 04-19-2010, 01:11 PM   #3
nkanakakis
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It far away from where I live
Do you suggest keep this oil for 2000-3000 miles or change it immediately?
I
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Unread 04-19-2010, 06:28 PM   #4
08KKJeepGrn
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Quote:
Originally Posted by nkanakakis View Post
It far away from where I live
Do you suggest keep this oil for 2000-3000 miles or change it immediately?
I
Ahhh, I think I hear the tow truck coming!!!! Get back there and have them change the oil!!!! the owners booklet says use ONLY 5w20 or 5w30... WTF.
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Unread 04-20-2010, 04:28 PM   #5
coder
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Usually 5w40 is for diesel engines only, it is to thick and has the wrong additives in it for a gasoline engine. If it was my KK I would replace it as soon as possible just to be safe.
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Unread 05-21-2010, 07:29 AM   #6
nkanakakis
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Finally I went to another dealer and changed oil to 5W-30 (This is the recommended viscosity for Greece) Thanks to all for your help
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Unread 11-02-2010, 01:35 PM   #7
SuperRliBerty
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Quote:
Originally Posted by nkanakakis View Post
It far away from where I live
Do you suggest keep this oil for 2000-3000 miles or change it immediately?
I
I replace my oil every 2000 miles. Pennzoil 5w-20 and a puralator gold filter.
Oil turns dark after 1500 miles but not black or sludgy
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