Originally Posted by Dr. Bill

I have 22K on my 09 hemi and it does not burn any oil at this time. I change the oil myself and I always check the level before I drain to monitor consumption with all of my vehicles. Check and make sure that you don't have a leak somewhere. You can change back and forth between mineral and synthetic anytime. What do you think a blend is?? It is true that if you have a leak that a synthetic will leak more because the waxes that are still in the refined mineral base will clog a leak, just like they do your oil galleys and passages with time. 5W-20 is pretty thin as it is, look for leaks.