Then why the differences in countries outside the US? Are you going to tell us that Xw-20 is not available anywhere outside of the US, or maybe that the “Euro” oils are the only thing available in Europe? Seems I remember a time when a 5w-20 oil was darn near impossible to find over the 5w-30/10w-40/sae30w that we’re on the shelves everywhere here. Now it’s Xw-20 Everywhere. Sure, they may use any oil during testing, but when you gotta squeeze a car engine to get an overall fleet mileage to CAFE standards, then you might as well be extorted. They just need that engine to last it’s normal 6 years 150k miles, so that your loan is paid off, and it’s time for a new one. 5w-20 will get you there, sure. But it’s hardly an issue to make it available everywhere else if it were so good. In fact, it would be economically feasible to keep less different weights worldwideManufacturers are not being extorted by the government. They may use any oil of their choosing during testing.