Hi EVOgone,
I know the situation with this as Stuart (my son) was in the same situation when he got the V6.
If you drive your car hard then Silkolne Pro S 5w-40 from Oilman above.
If on the other hand you want to stick to the manufacturers recomendation then call: -
Total Butler (in Castleford) on 01977 603363, just ask for Debra and its £69 for 24lts inc vat & del for ELF Excellium LDX 5w-40.
Stuart went down this route because Renault wanted £44 to do an oil change so if you offset that against the cost of of the ELF oil its almost paid for and you still have enough for another 4 oil changes.
Bryan