I used to work on an oil refinery so I actually know a bit about blending gasoline. The processes behind it are much the same the world over. Catalytic reforming for making high octane reformate which is sulphur & nitrogen free. Both Isomerate and Butane are sulphur free. FCCU cracked naphtha does contain sulphur, nitrogen & olefin's but that depends usually on crude source and, for a given crude, will be the same whether you're in the US or Europe. Yes you can occasionally get 'nasties' in mogas (coker naphtha and steam cracked naphtha) but that's exactly the same on both sides of the pond.
And these days what exactly is US and European gasoline?? During the US driving season, vast quantities of European refined mogas is shipped across the Atlantic and at other times, we Europeans bring in ship loads of gasoline from Saudi Arabia and India.
Oh, and did I mention that before working on engine oils, I used to formulate fuel additives? No-one uses lead anymore but the US and Europe both add the same cocktail of detergents, corrosion inhibitors and antioxidants in roughly the same amounts to gasoline (not that this has much bearing on lubricant performance).
I think the whole 'US gasoline is worse hence we need shorter oil drains' argument is entirely bogus. That however won't stop it being perpetuated by those parties that benefit from maintaining the status quo.
And these days what exactly is US and European gasoline?? During the US driving season, vast quantities of European refined mogas is shipped across the Atlantic and at other times, we Europeans bring in ship loads of gasoline from Saudi Arabia and India.
Oh, and did I mention that before working on engine oils, I used to formulate fuel additives? No-one uses lead anymore but the US and Europe both add the same cocktail of detergents, corrosion inhibitors and antioxidants in roughly the same amounts to gasoline (not that this has much bearing on lubricant performance).
I think the whole 'US gasoline is worse hence we need shorter oil drains' argument is entirely bogus. That however won't stop it being perpetuated by those parties that benefit from maintaining the status quo.