I've got about 300 miles on the Pennzoil syn 5w20 in my Chrysler. From a NVH standpoint, I'm not as impressed with this as I was the PureBase 5w20. I've got start up rattle from my main bearings with the syn 5w20. I didn't have any with the regular 5w20. Wonder if the 200+ ppm of moly vs the ~40 ppm has anything to do with that?
Overall, my engine just seemed to be smoother with the regular 5w20.
Overall, my engine just seemed to be smoother with the regular 5w20.