Another question for XOM:
Some European car manufacturers strictly advise against the use of low SAPs oils in their gasoline engines operated in the US. For example, Mobil1 ESP 5w-30 meets BMW LL-04 spec, and BMW recommends this oil for their gasoline and diesel engines in Europe. However, BMW advises against the use of this oil in their gasoline engines in the US, claiming poor gasoline quality in the US. Since XOM produces both the oils and gasoline in the US, can you elaborate on what exactly it is about the US gasoline that makes it incompatible with ESP oil? Does it have something to do with ethanol use in US gas? What negative effects might be observed if ESP oil were to be used in gasoline engines in the US?