Finally changed the oil. Had been on a trip to San Diego and returned a few days ago and the 6 quarts of 0W20 had arrived.
I was expecting that once I did the change from 10W30 Synthetic to 0W20 Synthetic, I'd hear a bunch of engine noise I hadn't heard before - valve clatter, etc because the oil would be too light.
But, I didn't really experience any new noise - if anything, the engine seemed slightly quieter at all RPMs. Did seem to rev more smoothly, better throttle response, felt like it was working against itself less, etc.
But, the most pronounced change with the 0W20 was obviously at cold startup. You turn the ignition key after the Jeep has been sitting in the cold all night and the engine comes to life like it was already warm and at around 210F - this even though the temp guage shows the engine is still cold. Am under the impression that most engine wear occurrs at start-up and start-up is looking pretty good, now, for this engine
About the only gripe I can see with this oil is finding it at a local retailer - Walmart, autoparts places, etc. Most don't carry it and they are not exactly selling it, yet, in those big econo jugs.
Note: I am using 5 quarts of the 0W20 since I am using the M301 oil filter which is larger than the standard filter. Also using one of those BearTrap deals to catch any metal.
