I've read this and the linked thread.
I've got 2x sealed, unused 1L bottles of "Castrol Magnatec Professional" SAE 5W-30.
The bottle says "FILLED ON 07/07/08".
Via the Castrol website, inputting the registration number for the GTi results in a recommendation to use Castrol EDGE 5W-30 although the website does also say:
"Castrol Magnatec is part of our wide range of premium oil products... PLEASE NOTE: the oil selector may show that Castrol EDGE is the recommended oil for your vehicle. In many cases you’ll see that Castrol Magnatec is ALSO suitable for your car and driving style. In this scenario EITHER PRODUCT will provide the protection and performance you need."
So, 2 questions please:
1. Does the 'date filled' stamp on the bottle mean that there is a shelf life for this oil?
2. Can this 5w-30 Castrol Magnatec oil that I have, safely and properly be used as top up oil on the MK6 GTi?
Thanks.