Looks like to date, Castrol, Valvoline, ConocoPhillips, and Amsoil have taken a stance to NOT officially license GM dexos but will make products that meet or exceed the specifications.
And then this consumer alert from the Federal Trade Commission:
Originally Posted By: AMSOIL February 2011 Hotwire blog
FTC Issues Consumer Alert on Magnuson-Moss Warranty Act
The Federal Trade Commission (FTC) recently issued a consumer alert clarifying that the Magnuson-Moss Warranty Act prohibits automobile manufacturers and dealers from denying warranty coverage based on use of an aftermarket product, unless they can show the product caused the damage or was installed incorrectly.
“The FTC’s statement should help those ILMA members, for example, who have decided not to license General Motors’ dexos™ engine oil,” said ILMA counsel Jeff Leiter. “Some ILMA members have complained to me that the automaker has made confusing statements about its new engine oil and warranty coverage for new vehicles. It makes sense to hand a customer a copy of the FTC consumer alert, showing that the use of equivalent products should not affect warranty coverage.”
The FTC consumer alert can be viewed at http://www.ftc.gov/bcp/edu/pubs/consumer/alerts/alt192.shtm.
And then this consumer alert from the Federal Trade Commission:
Originally Posted By: AMSOIL February 2011 Hotwire blog
FTC Issues Consumer Alert on Magnuson-Moss Warranty Act
The Federal Trade Commission (FTC) recently issued a consumer alert clarifying that the Magnuson-Moss Warranty Act prohibits automobile manufacturers and dealers from denying warranty coverage based on use of an aftermarket product, unless they can show the product caused the damage or was installed incorrectly.
“The FTC’s statement should help those ILMA members, for example, who have decided not to license General Motors’ dexos™ engine oil,” said ILMA counsel Jeff Leiter. “Some ILMA members have complained to me that the automaker has made confusing statements about its new engine oil and warranty coverage for new vehicles. It makes sense to hand a customer a copy of the FTC consumer alert, showing that the use of equivalent products should not affect warranty coverage.”
The FTC consumer alert can be viewed at http://www.ftc.gov/bcp/edu/pubs/consumer/alerts/alt192.shtm.