It's actually the Halfords branded 5w30 I'm after, apparently it's rebranded Comma stuff?
Don't suppose you'll be heading to a branch any time soon Grant?
Get two fat slabs of metal and bolt them to the underside of the front crossmember (?) then bolt the cooler to it. Should hold up nicely like mine Also for fuel cut, get the wastegate ported and it'll be a lot more stable and won't creep as much