As the DI engine becomes more popular there seems to be correspondingly more and more discussion re fuel dilution issues with these same DI engines. From some of the Used Oil Analyses I have seen over on BITOG these GM (DI) VVT 3.6 L engines are very hard on oil. This is my first visit to cadillacforums. I am wondering if this has already been discussed in detail? Elsewhere there is some thought that the choice of oil can help in combating the effects of excessive fuel dilution. Based upon any UOAs that might have been posted here is there a consensus re a 'best' oil? Thanks for your advice.