Just click here to get in touch with the e-mail I received from Opel at my request of the E-10 compatibility Opel Service Center Phone: +49 (0)6142 – 7 75000 Fax: +49 (0)6142 – 7 67999 Dear Mr., we would like to thank you for your e-mail of 10 January 2011. According to the test results of our respective department, only the vehicles with the 2.2 litre gasoline direct injection engine (with the engine type Z22YH) were identified as non-E10-compatible. Therefore, all cars specified for superfuel from General Motors Europe – except this one exception – tolerate the “Super E10 sulfur-free ROZ 95” (DIN 51 626-1). Thus, there is nothing against the use of E10 fuel for your Opel Omega with a displacement of 2.5L. In the hope of having helped you with this information, we remain with the best regards Adam Opel AG