You can go for a 10w-40 semi synthetic with regular changes or better still 5w-40 synthetic changed every 10,000 or once a year, which ever comes first.
http://www.opieoils.co.uk/c-656-5w-40.aspx
Gearbox, 75w-80 I would go for this one as it is also Citreon approved
http://www.opieoils.co.uk/p-981-fuch...ion-fluid.aspx
Cheers
Guy