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Grand Cherokee 3.0 CRD WH.
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15 Posts
Hi.
They have crank bearing issues so Jeep changed the oil spec. The new spec calls for a heavy duty diesel engine oil. E9 is the euro spec and i think CK4 is the US spec. They also went from 5w30 to 5w40.

Shell Rottella T6 5w40 is excellent.
 

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Grand Cherokee 3.0 CRD WH.
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15 Posts
I use Valvoline Advanced Full Synthetic SAE 5W-30 engine oil, which protects against high temperatures and engine overheating, which is what I need, and I also drive quite long distances. You need to choose the oil depending on your needs and driving style.
Hi Tony
Which engine are you using the 5w-30? If it is the Ecodiesel then it is incorrect. You need a 5w-40.
 
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