Given that some take any intentional blend of oils as "CATERHAM" blend, I'll post...not claiming it's CATERHAM blend.
L67 - 3 parts Caltex C3 5w30, 2 parts Delo GOld Ultra. Intent with that was synth blend, fairly high adds. Border 30/40 grade, High HTHS, and cheap (were rebottled by local auto parts chain)...a little lubromoly.
Nissan - 5L Penrite 10-tenths 10W-40, and balance Mobil 3000 5W-40. Intent, getting through what was in the shed, with what I could buy to minimse orphan quartage.
Available next round of changes...
Penrite 10-tenths 5w30 (was cheap on closeout)
Castrol Magnatec SP 5W-40 - probably nearly enough for a Nissan change in and of itself (after Dad died, Mum didn't want a part full 20L rum in the shed, so it wasn't planned, but the Nissan goes well on this stuff...and it's green).
Caltex C3 synthetic - 3L or so
Delo 400 Gold - 3L or so
Probably use them n the L67.