Originally Posted by Bassman273
I have a 2012 Grand Cherokee with Pentastar engine 6 cylinder . It just turned 4000 mikes and now I hear a loud tapping sound(lifter?) What's the deal?
Has the oil been changed recently?
all the jeeps that my dealership sells have the oil change intervals set to either 3000 or 3500 mile intervals.
It does not seem that life of the oil is that long and besides that the oil filter is pretty small too.
I decided to wait until the second oil change to use Mobil 1 5w-30 extended performance.
After I change the oil to synthetic the engine is so much quieter than it was prior to using Synthetic so that alone justifies the cost of the mobil one.