due to re fill my 7inch 2wd diff soon thats in use on my kitcar , so just checking whats best ,done a bit of searching on here and so far have come up with...

http://www.ebay.co.uk/itm/Millers-Oi...item53f334c8a6

or this ??

http://www.ebay.co.uk/itm/Castrol-Sy...item460bd628a6

and is it 1 litre or slightly more ?

cheers ant