Even if they did update the engine, it would be to better tolerate a lower-viscosity oil without excessive wear. It's the only reason because besides a marginal fuel economy increase there is no advantage to thinner oils.
Because they are required by the EPA to run whatever oil grade that was used to pass their CAFE test. No exceptions. That's why they will never tell you that it's Ok to run anything but VW508. They can't by EPA rules.
Because they are required by the EPA to run whatever oil grade that was used to pass their CAFE test. No exceptions. That's why they will never tell you that it's Ok to run anything but VW508. They can't by EPA rules.
Close, they are not required to use the specific oil but they must aggressively promote the use both in an owner’s manual and in marketing materials. They must also work to guarantee availability of the oil both at the dealership and in the general marketplace. But they are not required to use what’s recommended in the manual or on an under hood sticker.
Because they are required by the EPA to run whatever oil grade that was used to pass their CAFE test. No exceptions. That's why they will never tell you that it's Ok to run anything but VW508. They can't by EPA rules.
No but you do have fuel economy and CO2 emissions standards, first based on EU requirements and now on your own. ACEA Sequences have responded with a maximum HT/HS of 2.6, and are set to decline to <2.6 in three years.