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Unread 12-07-2010, 01:32 PM   #1
chriswilliamson
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2010 KK Liberty 
 
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Location: marham england
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why o w 40

can i run 2010 kk crd on 10w40 oil ? book says 0 w 40 i only use the vehicle in uk whats the difference most uk trucks run 10w40

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Unread 12-07-2010, 03:40 PM   #2
Elt31987
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0W40 will flow quicker at cold temperatures. 10W40 will not flow as quickly when its cold
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Unread 12-08-2010, 10:51 AM   #3
royhkeith
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Quote:
Originally Posted by chriswilliamson View Post
can i run 2010 kk crd on 10w40 oil ? book says 0 w 40 i only use the vehicle in uk whats the difference most uk trucks run 10w40
My owners manual and the oil fill tube cap on my 2010 KK (3.7L engine) calls for 5W-20 oil for "all operating temps". Is there a difference in engines in US and UK Jeeps?
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Unread 12-08-2010, 11:46 AM   #4
SCT100
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Quote:
Originally Posted by royhkeith View Post
My owners manual and the oil fill tube cap on my 2010 KK (3.7L engine) calls for 5W-20 oil for "all operating temps". Is there a difference in engines in US and UK Jeeps?
No. But yours is gas, and the CRD is the diesel motor, and that motor specifies a different weight oil.
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Unread 12-08-2010, 01:21 PM   #5
royhkeith
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Originally Posted by SCT100 View Post
No. But yours is gas, and the CRD is the diesel motor, and that motor specifies a different weight oil.
I should have checked his profile to see which engine he has.
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Unread 12-08-2010, 01:30 PM   #6
chris142
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10w40 oil is not a diesel rated oil. Most 15w40's are a HD diesel oil and they would probly work if the outside temps are not too cold. But since MB wants a 0w40 I'd stick with that.

I would not use a non diesel rated 10w40 in a diesel.
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Unread 12-09-2010, 01:45 PM   #7
chriswilliamson
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cabbin heater

i had 2003 and a2006 kj they both had 10w40 oil but also were fitted with viscos cabbin heaters is this what makes the differance. the kk does warm up slower shame i can get 10w40 f.o.c welcome all replies
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Unread 12-09-2010, 02:03 PM   #8
chris142
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The oils viscosity(thickness) isn't as important as the ratings. A diesel engine has different needs than a gas engine due to the amount of Contaminants that get into the oil. Diesel oils are designed to combat these contaminants.

Gasoline engines don't see these contaminants so Gasoling oils do not have the needed addatives.
If you look in your owners manual you will see other numbers and letters other than 0w40.

These mean more than the oil viscosity does.


− Mercedes MB 229.5
− Porsche Approval List 2002
− GM-LL-A-025 (gasoline)
− ACEA A3, B3/B4

− BMW Longlife 01
− VW 502.00/505.00/503.01
− GM-LL-B-025 (diesel)
− API SM/CF



Mobil 1 0W-40
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